Win 7 32 bit / 64bit on same PC

Hi all, I am running Windows 7 Ultimate 32bit, with multiple OSs and multi boot.

Disk 0 Windows 7 - 32 bit
Disk1 Data which can be moved
Disk2 Windows Vista Untimate - 32 bit
Disk3 Windows XP SP2 - 32 bit

Is is possible to install Windows 7 Ultimate 64 bit on Disk 1 and keep Win 7 32 bit on disk 0?
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wlennonVP of Domestic & Int'l OperationsAsked:
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JohnBusiness Consultant (Owner)Commented:
If your PC is a true 64-bit machine and the disk partitions are separate, then it should work. It may depend on how you loaded them up the first time, but it should work. 64-bit PC's will run 32-bit OS's, but not the other way around. ... Thinkpads_User

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Yes, it will work, and definitely on separate disks/partitions. Starting with Vista, Windows carves out a 100MB partition at the beginning of Disk0 called the Boot Control Device (BCD). Once you get creative with lots of disks, partitions, and OSs, you will probably need this
Look for EasyBCD. The current version works great for all Windows OSs, but you can register in their forums and download a beta that does a lot more for a lot more OSs. I have used EasyBCD with Win7 and Linux for months.
wlennonVP of Domestic & Int'l OperationsAuthor Commented:
Wonder what happened to my comment from matter I suppose. Anyway, the install went I am getting the full benefit of the Core i7 Extreme Edition 3.20 GHz QPI 6.40 GT/s and 16GB of Crucial Ballistx memory (just built this PC).

My other desktop is a work only PC with Red Hat Enterprise and have a copy of SuSE. Have been using OSL2000 as my multi  OS boot loader, bought it 6 years ago for $14.95, lifetime upgrades.

First correct answer it thinkpads_user, thanks guys!!!
wlennonVP of Domestic & Int'l OperationsAuthor Commented:
Quick answer and spot on...
JohnBusiness Consultant (Owner)Commented:
Thanks and I hope it goes well for you. ... Thinkpads_User
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