ok, all solved , to dual boot
install windows first, then pop in a fc10 dvd.
click manual config, ( no dynamic volumes )
on sda
ntfs ( slow doze )
make a boot partition, 200 megs
make a root partition, $$$ gigs
swap = twice ur memory, so 20 gig swap for 10 gigs of ram
tell grub to use the sda of the boot partition.
Now you are done, edit /boot/grub/grub.conf