I must confess I've never really messed around with GPT as I've never needed to, ...
http://www.majorgeeks.com/files/details/aomei_partition_assistant.htmlPlease note that you will able to convert your MBR disk to GPT only if your PC (motherboard to be precise) supports UEFI.
http://www.intowindows.com/convert-mbr-to-gpt-disk-without-data-loss/Laptop does support UEFI, desktop does not.
Converted disk to GPT, then reimaged Win7 partition, drive now indicated MBR.
Changed boot order in desktop, it's not bootable, it boots the WinXP drive.
Rebuild the MBR, still won't begin to boot.
Delete partition & reimage drive from within WinXP.
It completed as am typing this, Windows Explorer window appeared showing the Win7-64. Maybe it's now bootable?
UPDATE: Windows splash screen started, then BSOD. Not surprising, desktop SATA controller is not AHCI.
Calum said: If you're not already in AHCI mode, there's an easy trick to change it, and change your drivers, otherwise Windows will blue screen on boot as the wrong storage driver will be loaded.Reflect did downward resize the image of the OS partition & knows what the size of the 2 other partitions would be, if they were there. Next time I take an image of the laptop, I'll do the entire drive.
Lessons Learned:1. Don't attempt a GPT conversion on a boot drive, even if not booted from that drive.
2. Aomei Partition Assistant 5.2 helps you convert
only data or non-system disks to GPT without data loss. In other words, you can’t use this tool to convert system disks (disks on which Windows installed) to GPT without losing data. AFAIK, this is the only partition manager able to do this.
3. This would require doing a clean install of Win7. Not worth it on a laptop with 1 drive with 3 partitions.
[recovering disk space, attachment deleted by admin]