Dual Boot Vista

[wildflower]

I have a new laptop which came with Vista Home Premium 64 bit. I am fed up not being able to use any Flash addons due to there not being a 64 bit version. I tried using the 32 bit IE 7 and Firefox to download the flash addons but the computer rebels and won't install it let alone download it.

I have had a multiboot system running since Windows 98 so I'm used to using partitions to install several different OS's so to solve this problem I have partitioned my HDD with several partitions for XP pro 32 bit and Vista Ultimate 32 bit and a data partition. The Vista Ultimate I own is the full OS, not an upgrade version.

I read all the info I could find on installing a 32 bit version of an OS with a 64 bit version of an OS but when I attempted to install Vista Ultimate from within the existing OS it wanted to replace Home Premium instead of install to it's own partition. I haven't tried installing it by booting with the installation CD yet, because I ran into some information that told me I couldn't have two copies of Vista on the same machine.

So my question after all this is can I run Vista Home Premium, and Vista Ultimate on different partitions on the same HDD or am I violating the Eula by doing this?

I have a couple of other questions but this is the main one.
Thanks