On trick I don’t remember how to do each time, and I have to search my mail archive for is: how to add a preview image to the .ipa when you make an AdHoc Dstribution.
So I drag the app to iTunes, then back out.
Then on the command line:
zip -u PhotoGeo.ipa iTunesArtwork
where iTunesArtwork is a 512×512 jpeg file.
Now I know where to find that trick.
Credits : epatel @memention