HELP! DSDT not working!!

So today I decided to update my MB to the latest BIOS and wipe the slate clean on my installation. I downloaded the latest BIOS and flashed my MB using Qflash and proceeded to change all the necessary settings in the BIOS (HPET to 64 bit mode, Sata to AHCI, Diabled Quick Boot, etc). I then created a bootable Lion USB using Unibeast 1.5 on my MacBook. I installed Lion without a hitch on my build and everything seemed to be working as it should. However, when I went to use Multibeast with UserDSDT my computer essentially turned to mush. Upon reboot it would hang on a white screen for about 15-20 seconds before taking me to the log in screen. While at the log in screen it would take very literally about 4-5 minutes for my keystrokes to register. After hitting enter to log in I decided to wait and see what would happen. After somewhere around 30-40 minutes it logged in to my desktop and then completely froze. Very strange problem. I tried reinstalling 2 times to no avail. Thinking that it could be a problem with the latest BIOS (F8) I flashed my MB to my previously working F3 and ran into the same problem. I have already reinstalled Lion about 10 times and I feel like I have tried everything. Am I missing something stupid here or is this just a really strange problem? Someone please help!!

Note: After writing this I realized the I should have used "Firmware Version" as opposed to the word BIOS in a lot of places. (I Think)...please disregard any ignorant looking sentences...just a Noob here!

I have had the same problem with my DSDT, it's a pain because alot of features don't work, sleep, app store, crashes when USB's are plugged in sometimes, I hope somebody can help