@FUSE08
you probably found it already, but just in case, the ixus90 porting thread is here:
ixus90/sd790 IS portingalso, please note there might be more firmware versions in circulation, you might want to dump your own
firmware (if you're on windows, try CardTricks, link in my sig)
if you're going to contribute to porting, this link might be useful too:
For Developers - CHDK Wikihave fun,
wim