here there is a beta bios, i tested it,seems stabel to me but use it at your own risk.

http://www.megaupload.com/?d=IUJFDRNH

About the temp problem i solved in this way:

1) dismount the heatsink
2) clean the bad therma pad originally used with tryeline
3) put some good therma grease, i reccomend to use no conductive grease ( i use artic ceramic)
4) take out the fancy blu plate over the heatsink
5) mount again
6) put a little fan over the NB area

It worked pretty fine for me