Hello folks, im kinda new to all this so apologies for the nub post.

I'm trying to install BT4 onto my comp on a different hdd to win7 to dual boot
Win7 is on 2x raptors in raid0, im installing BT4 onto its own 250gb sata drive.

I've booted off the dvd fine, ran the installsh, gone through to partitioning business, but when i reboot it jsut loads up win7, if i set the drive i isntalled BT4 onto as first boot it says invalid system disk?

Any thoughts to what im doing wrong?