Seven and Xp boot fine.
Mint 8 installed last WITHOUT GRUB2
Single drive with first primary partition(Z:) as active with XP installed. C: in XP, Z: in Seven.
Second primary partition(C:) is Win 7. C: in 7, Z: in XP.
Third is extended partition with 2 logical NTFS drives. (Part 3 & 4)