The author of Project Snow has posted his dsdt on that site, both in .dsl and .aml format. His audio solution will likely not work OOB for you however. I think the sound issues from the black jack in back with layout-id "12". Try layout-id "66" or in hex, "0x42, 0x00, 0x00, 0x00" with the proper codec-id and sound should be fine. It's worked for everyone else so far.

Alternatively there is a thread over on Insanely with a .pdf detailing exactly how to mod your dsdt (for the UD3x) for SL.

If you speak Spanish, Pere has a expansive DSDT site at osx86.es

I don't think my DSDT will help you past the kps.

What's your hardware?

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q6600 @ 3.6 gHz (In Leopard) (9 x 400)
ep45-UD3P ver. 1.0, bios F10e (1.20 ahci)
Sapphire 3870
4 gigs 1066 Reaper
8 x WD 250 YD-01NVB1
800w BFG ES
Xig S1283
20" $10 Box Fan & a deconstructed P2 case with the side removed.