i dont think its possable to get 2.2 AND all the features running correctly..everything ive read has said that rk2818 does not support 2.2..hence the broken/unfinished features and stopped dev of cyanogenmod..
i may try flashing the 2Gb pad with cyanogen..not really sure tho..i dont really like the idea of changing the bootloader and kernel..
btw...i changed the build.props in my latest ROM hack version to change the LCD screen density..i changed it to 120 and it had the effect of making the resolution larger, and making everything smaller, allowing more menu items etc to show on the screen..ive read that the market as problems it is not set to 160 or 240..but its working fine (actually shows more apps than my 4GB pad!)
also added a few tweaks to build.props that ive found on the web...seems to be the fastest pendo ive used! (faster than my 4GB!)