I lost the boot menu when I dual installed Vista and Win7 RC1. I used this program to get it back again - it was really easy.
http://neosmart.net/thankyou.php?app=EasyBCD
I tried the demo this morning, and hit the mouse lag issues. I've read around to try a few things to fix that. I think I'll go back to XP as well - I've noticed FPS issues in other games as well.
I'm using my laptop - but I should get a decent framerate, even though it's not a super powerful laptop.