grub, xen, and/or vm: vista and unix & linux
circumstances: vista-32 on 64-bit machine [Intel DG965RY mobo; Intel E6400 processor]. c:\250GB HDD holds vista-32, d:\500GB HDD vacant (although possibly automatically formatted when integrated.)
i want to install unix and linux on the d:\. i want to be able to move between the os's at run-time. i will also install GCC.
what is the best strategy to accomplish this? does vm figure into this? i will need you to express details, such as where to install Xen or Grub (c:\ or d:\), and what unintended consequences i might encounter (such as invoking the ire of resident vista -- i want to avoid a vista reinstall).