Hi,
Yes, it is. You'll need to carve out space on the drive for the second
installation, and you'll need an additional license for Vista. To carve
out space, run diskmgmt.msc and shrink the existing volume. At a minimum
I'd suggest you allow 20-25GB for the x64 install. If disk manager cannot
carve out that much, you'll need to use a third party tool like Acronis
Disk Manager or BootIT NG (disk manager may run into unmoveable files and
cannot shrink a volume beyond that, the other programs can).
Once space has been created, boot with the x64 disk and begin setup. You
can create the new partition and format it as part of setup. Select it and
installation should be pretty straight forward from there. Setup will
create the dual boot menu as part of the installation.
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help -
www.rickrogers.org
My thoughts
http://rick-mvp.blogspot.com