1. Yes .. I've found most big name apps run but stuff like OSX86Tools, LittleSnitch, etc, don't.
2. If you boot 64 then your 32 bit kext are ignored. For example, I have a 32 bit kext for my wireless card so it's not loaded and so I don't have wireless. There's a Russian site that has most of the required kexts.
3. Haven't tried RC2 .... I was under the impression that it did not work. I'll try it when I install 432 later tonight.
4. Yes .... I copied my DSDT from my Leo drive over to my SL drive and everything is OK. The DSDT is machine specific not Leo specific.
I've had more luck with 64 than 32.
It just means getting the 64 dsmos, decrypt, disabler, etc, files loaded.
The only 64 kext that I have missing at the moment is the one to get my RTL1000 running. Looks like I may have to look to a plist solution.