I would put the OS back on C:
Backup all your data.
Partition Magic 7 or newer will do this.
It will resize the partitions.
But backup to be safe.
I am running WinXP professional. My HD is 80 GB and I established a 10 GB partion for the OS. I would like to change it to 20 GB.
I have explored the XP utility Diskpart and it will let me change everything except the C drive, where the system is located.
I even cloned the entire C drive to a new partion (H) and set it as active. When I rebooted, I was running was running out of the H drive, but the C drive was flaged as "page file" and DiskPart would still not let me change the C allcation.
Is there a way of doing what I want, short of reinstalling everything?
I believe Partition Magic will do this, but I really don't want to spend $70 bucks.
Thanks

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic