You can extract CABs with 7zip, WinRAR, and most other archivers. Then you can use jdoe's CAB Tool found on these forums or PowerArchiver (or makecab/cabarc if you know what you're doing) to rebuild the CAB afterward. Otherwise, here's a hint. If you're using my integrator, you can always create an addon http://ryanvm.net/forum/viewtopic.php?t=1290