I haven't tried it yet I'm still using 4981 seing as my xbox is an ongoing project and i haven't had the chance to update yet. The only other thing about the new x2 bios is it is 512k so will take up 2 of your TSOP banks (if you have done a 4-way split or 1 bank if you have done a 2-way split). On the new x2 5035 bios use a program called x2ool by klutsch or the other one by nightshade, they're both available from the main page. This allows you to edit loads of stuff, boot sequence, colours, image where the MS text goes all that stuff. On the older x24981 bios you need xbtool preset maker to change the colours and preview them, but you can't replace xecuter2 under the big X. To flash the bios onto the chip just use evox, boot up with the bios bank you want to flash then flash it. Or if you don't have a bios on that bank boot up on another, flip the switches and then flash.