Can you just create a virtual directory in your IIS and point it to the location you want? Then set your image gallery path using

 

app-based path or  absolute path ?

 

C# Example:

//use the app-based path 

Editor1.Setting["security:ImageGalleryPath"]= "~/uploads";

//use the absolute path 
Editor1.Setting["security:ImageGalleryPath"]= "/uploads";

//use the physical path 
Editor1.Setting["security:ImageGalleryPath"]= @"c:\inetpub\wwwroot\uploads";