Install all 3 at the same timePost results.
Get everything that you need/want off, and on to a flash drive or external hard drive.Then, put one in, and choose the reformat option, then put it in again once that is done and install.
My dad managed to install Windows XP on one drive and 7 on another, I can boot either one.Not really useful or ontopic, but might as well chat.
I have no space left on any of my hard drive.BRB deleting system 32 (that helps right)
Dual-booting is moderately easy. If you have one hard drive, split your hard drive into 2 partitions. One partition will be the primary one, and the other will be the secondary OS. If you have two hard drives, (of course one of them has a primary OS before you did this ) install the secondary OS on the other.
If you're going to install Windows XP and dualboot 7 as well, install XP first, THEN Windows 7. Windows 7's boot manager is backwards compatible, and will allow you to boot Windows XP as well. However, XP's boot manager can't boot Windows 7 or Vista because they are newer. You would have to go into recovery mode through your windows 7 DVD and repair it.
Or you could just use another boot manager like GRUB, in which case it wouldn't matter which order you installed them in.