I would like to add a proper screenshot to an iPhone product image to create an ad for an iOS 7 app. Apple provides such product images as
*.psd files for Photoshop, however I only have Gimp 2.8.10 (for OS X) available. When viewed in GIMP, the product image contains two layers: one for the whole device, the other for its screen.
Adding the raw screenshot to the product image is simple enough: "Open as Layers ..." plus "Scale Layer". However, I am also supposed to hide my actual (screen-captured) status bar in favor of Apple's generic version (it has a full battery icon, etc). Apple's App Store Marketing Guidelines state that "status bar options are provided on different layers within the Smart Object layer" but GIMP apparently does not render these finer details in the
*.psd file (and I am also unfamiliar with these concepts).
So my question is this: can I use GIMP to combine my screenshot with the product image template such that a generic status bar in the template becomes visible without "brute" copy/paste, i.e. by following a procedure analog to the one prescribed for Photoshop? What would be the right steps?