Dual Booting (Questions)

I want to Dual Boot. Windows Vista and Windows 7 Beta.

Im not sure exactly how, i belive i just make a partition, and install. But i have 2 HDD's. I know it would make it easier to just put it on the 2nd, but i cant, not enough room, to move everything form 2nd to 1st.

So, first of all, How much room do i need, (for Partitioning, Windows 7, and some extra space for programs and stuff)????

2nd, How do I create a Partition?

3rd, how do i choose what OS to boot from? (Vista or 7), how do i choose which one at startup???

4th, i dont want to screw anything up, so i need step by step instructioons. please.

Please assist me, i can figure things out usually, im not stupid, but i wan tto make sure.

And itll be nice if these are all free things to make partitions, and do this crap. i dont really have 1,000 bucks to spend on this.

 

Check this out It should solve your problem

 

thanks, but just realized i skrewd things up.

i want to put this partition on my 2nd HDD... not my 1st, with vista on it...