Hard drive usage

I installed Windows XP Pro when I had Windows XP Home. And now I found that I've almost totally used up my hard drive. I assume that when I installed the updated version of Windows I didn't format the drive correctly. Here's my question: how can I remove the old operating system with losing everything and having to start all over.

 

You will need a program like partition magic, i will try to find you a free one. ed
Do not delete the active partition.


try this,

http://www.majorgeeks.com/Partition_Logic_d4780.html

 

Thanks Ed,
Does it matter if they are in the same partition?

randhlmn