If this is what I think your talking about, open the skin of your choice in Skinstudio then select XP specific sections. When the new window opens, select +Xp specific, +Shellstyle, then the images will be in +Movies Logo(Large). That is the image that is displayed in window when you open that folder, (Small) is the image that shows on the right side of the text in the Pane where it says Movie Tasks. Then its the same for Music Logo, Picture Logo and Search Logo.
If your making a completely new image then you might have to import it from the folder you saved it in which should have been C:\Documents and Settings\All Users\Shared Documents\Stardock\Windowblinds\ (the WB you working on)\shstlargefilm.bmp
I hope this is what you were talking about
