diff --git a/README.md b/README.md
index d7f624ebc..c4068b4b5 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ gpm(Go Package Manager) is a Go package manage tool for search, install, update
 ## Todo
 
 - Command `install` add support for downloading code from code.google.com, launchpad.net, bitbucket.org; hopefully, support user sources for downloading tarballs.
+- Command `install` installs all packages after downloaded.
 - After downloaded all packages in bundles or snapshots, need to check if all dependencies have been downloaded as well.
 - Develop user source API server template application to support user sources in bundles.
 - Add bundle and snapshot parser code for downloading by bundle or snapshot id.
diff --git a/conf/gpm.toml b/conf/gpm.toml
index 144841e0a..5ccb9e962 100644
--- a/conf/gpm.toml
+++ b/conf/gpm.toml
@@ -2,4 +2,6 @@
 
 title = "gpm(Go Package Manager)"
 version = "v0.0.3 Build 0519"
+username = ""
+password = ""
 user_language = "en-US"
\ No newline at end of file
diff --git a/doc/github.go b/doc/github.go
index 392439a20..e14854e2c 100644
--- a/doc/github.go
+++ b/doc/github.go
@@ -28,7 +28,7 @@ func SetGithubCredentials(id, secret string) {
 }
 
 // GetGithubDoc downloads tarball from github.com.
-func GetGithubDoc(client *http.Client, match map[string]string, commit string) (*Package, []string, error) {
+func GetGithubDoc(client *http.Client, match map[string]string, commit string, isDownloadEx bool) (*Package, []string, error) {
 	SetGithubCredentials("1862bcb265171f37f36c", "308d71ab53ccd858416cfceaed52d5d5b7d53c5f")
 	match["cred"] = githubCred
 
@@ -143,6 +143,11 @@ func GetGithubDoc(client *http.Client, match map[string]string, commit string) (
 	// Check if need to check imports.
 	if isCheckImport {
 		for _, d := range dirs {
+			// Check if current directory is example.
+			if !isDownloadEx && strings.Contains(d, "example") {
+				continue
+			}
+
 			dir, err := os.Open(d)
 			if err != nil {
 				return nil, nil, err
diff --git a/gpm.go b/gpm.go
index d2d3cce9b..0020e9ad7 100644
--- a/gpm.go
+++ b/gpm.go
@@ -28,8 +28,9 @@ var (
 )
 
 type tomlConfig struct {
-	Title, Version string
-	Lang           string `toml:"user_language"`
+	Title, Version     string
+	Username, Password string
+	Lang               string `toml:"user_language"`
 }
 
 // A Command is an implementation of a go command
@@ -138,20 +139,35 @@ func loadUsage(lang, appPath string) bool {
 	return true
 }
 
-func main() {
+// We don't use init() to initialize
+// bacause we need to get execute path in runtime.
+func initialize() bool {
 	// Get application execute path.
 	if !getAppPath() {
-		return
+		return false
 	}
 
 	// Load configuration.
 	if _, err := toml.DecodeFile(appPath+"conf/gpm.toml", &config); err != nil {
 		fmt.Println(err)
-		return
+		return false
 	}
 
 	// Load usages by language.
 	if !loadUsage(config.Lang, appPath) {
+		return false
+	}
+
+	// Create bundle and snapshot directories.
+	os.MkdirAll(appPath+"bundles", os.ModePerm)
+	os.MkdirAll(appPath+"snapshots", os.ModePerm)
+
+	return true
+}
+
+func main() {
+	// Initialization.
+	if !initialize() {
 		return
 	}
 
diff --git a/i18n/en-US/usage_install.txt b/i18n/en-US/usage_install.txt
index 78bf628e7..c11c54e11 100644
--- a/i18n/en-US/usage_install.txt
+++ b/i18n/en-US/usage_install.txt
@@ -13,6 +13,8 @@ The install flags are:
 		download without installing packages.
 	-u
 		force to update pakcages.
+	-e
+		download dependencies for examples.
 
 The list flags accept a space-separated list of strings. To embed spaces
 in an element in the list, surround it with either single or double quotes.
diff --git a/install.go b/install.go
index d3e4d1d1c..afff74734 100644
--- a/install.go
+++ b/install.go
@@ -30,7 +30,8 @@ func init() {
 	cmdInstall.Flags = map[string]bool{
 		"-p": false,
 		"-d": false,
-		"-u": false,
+		"-u": false, // Flag for 'go get'.
+		"-e": false,
 	}
 }
 
@@ -42,6 +43,8 @@ func printPrompt(flag string) {
 		fmt.Printf("You enabled pure download.\n")
 	case "-d":
 		fmt.Printf("You enabled download without installing.\n")
+	case "-e":
+		fmt.Printf("You enabled download dependencies in exmaple.\n")
 	}
 }
 
@@ -103,7 +106,7 @@ func runInstall(cmd *Command, args []string) {
 
 	// Download packages.
 	commits := make([]string, len(args))
-	downloadPackages(args, commits)
+	downloadPackages(args, commits, cmdInstall.Flags["-e"])
 
 	if !cmdInstall.Flags["d"] && cmdInstall.Flags["-p"] {
 		// Install packages all together.
@@ -116,7 +119,7 @@ func runInstall(cmd *Command, args []string) {
 // downloadPackages downloads packages with certain commit,
 // if the commit is empty string, then it downloads all dependencies,
 // otherwise, it only downloada package with specific commit only.
-func downloadPackages(pkgs, commits []string) {
+func downloadPackages(pkgs, commits []string, isDownloadEx bool) {
 	// Check all packages, they may be bundles, snapshots or raw packages path.
 	for i, p := range pkgs {
 		// Check if it is a bundle or snapshot.
@@ -128,11 +131,11 @@ func downloadPackages(pkgs, commits []string) {
 		case utils.IsValidRemotePath(p):
 			if !downloadCache[p] {
 				// Download package.
-				pkg, imports := downloadPackage(p, commits[i])
+				pkg, imports := downloadPackage(p, commits[i], isDownloadEx)
 				if len(imports) > 0 {
 					// Need to download dependencies.
 					tags := make([]string, len(imports))
-					downloadPackages(imports, tags)
+					downloadPackages(imports, tags, isDownloadEx)
 					continue
 				}
 
@@ -152,7 +155,7 @@ func downloadPackages(pkgs, commits []string) {
 }
 
 // downloadPackage download package either use version control tools or not.
-func downloadPackage(path, commit string) (pkg *doc.Package, imports []string) {
+func downloadPackage(path, commit string, isDownloadEx bool) (pkg *doc.Package, imports []string) {
 	// Check if use version control tools.
 	switch {
 	case !cmdInstall.Flags["-p"] &&
@@ -173,14 +176,13 @@ func downloadPackage(path, commit string) (pkg *doc.Package, imports []string) {
 		downloadCache[path] = true
 
 		var err error
-		pkg, imports, err = pureDownload(path, commit)
+		pkg, imports, err = pureDownload(path, commit, isDownloadEx)
 		if err != nil {
 			fmt.Printf("Fail to download package(%s) with error: %s.\n", path, err)
 			return nil, nil
 		}
 
 		//fmt.Println(pkg)
-		//fmt.Printf("Downloaded package: %s.\n", path)
 		return pkg, imports
 	}
 }
@@ -202,7 +204,7 @@ func checkGoGetFlags() (args []string) {
 type service struct {
 	pattern *regexp.Regexp
 	prefix  string
-	get     func(*http.Client, map[string]string, string) (*doc.Package, []string, error)
+	get     func(*http.Client, map[string]string, string, bool) (*doc.Package, []string, error)
 }
 
 // services is the list of source code control services handled by gopkgdoc.
@@ -214,7 +216,7 @@ var services = []*service{
 }
 
 // pureDownload downloads package without version control.
-func pureDownload(path, commit string) (pinfo *doc.Package, imports []string, err error) {
+func pureDownload(path, commit string, isDownloadEx bool) (pinfo *doc.Package, imports []string, err error) {
 	for _, s := range services {
 		if s.get == nil || !strings.HasPrefix(path, s.prefix) {
 			continue
@@ -233,7 +235,7 @@ func pureDownload(path, commit string) (pinfo *doc.Package, imports []string, er
 				match[n] = m[i]
 			}
 		}
-		return s.get(doc.HttpClient, match, commit)
+		return s.get(doc.HttpClient, match, commit, isDownloadEx)
 	}
 	return nil, nil, doc.ErrNoMatch
 }