Dual Boot Question

[ste-sim2x9]

I have windows 7 x64 and would like to duel boot with vista x86, i have a formatted partition on a hard drive in my pc.

The question is.

If i install vista will i lose my operating system i have now or will the computer install the duel boot menu without touching my current system.

 

[ste-sim2x9]

thanks people

 

[ste-sim2x9]

I have another question, if i want to delete the windows vista and duel boot menu after, how will i do it.