Install Windows 7 on my PC

Hello,

I just see that the beta of Windows 7 is released, I told myself that I could test it as I never tried Vista ...
But I do not know how to install it on my PC without uninstalling XP, I have a hard drive partitions 2,
one with free 25Gb (XP is installed on) and another with 29Go free (no system on it), I do not know if I can and if I do anything to risk my PC.

Thank you.

Well I have to install on my D and indeed

at start have the choice between Vista and Windows 7

Just install the OS on the partition with no OS and do you have the choice at startup. This works with any OS (Linux, Vista, Xp ,...)

So it is enough to launch the DVD on my XP and choose the partition as installation?