I use the new X2 Bios on my Chip (5030 Beta (Its 512k allready))
but if you are going to use M8 you MUST use this one EvolutionX M8Bios_v1.6.rar on a 1.6 board, anything else wont work (no video)
Guide to making the Bios CD -
http://xbox-scene.com/articles/bios-cd-xp.phpignore the 1meg stuff.
to make the file 512k you can use EVtool -
http://home.alltel.net/nghtshd/evtool.htmlyou can also agg In Game Reset to M8 using Evtool
Its pretty easy to use Evtool,
Glad you got the chip working :)