Import as many items as you want into a GTA San Andreas IMG file, search for specific entries, remove unwanted content, then repack the archive to make it game-ready. The tool doesn't work with IMG archives for Grand Theft Auto 3 or Grand Theft Auto Vice City.
Alci's IMG Editor is a useful IMG editor - a combination of spark and IMG tool. This tool can only be used with the GTA San Andreas archive format (no GTA 3 and GTA Vice City support so far). It can be used to import one or more items into the IMG files and rebuild your IMG archive.