>I have a pc that has a 20Gb drive. It was partitioned to have two logical drives C: (about 17Gb) and D: (about 3Gb). I think I partitioned it but don't remember how and with what. I had XP Pro installed in partition C:. and all kind of old program files. I thought that if I reinstall XP it will clean up the drive and I will have one logical partition. But now, I just noticed that I have two copies of XP installed, one on C, one on D.
>
>How can I unpartition drive D (without commercial software), format drive C and install XP again?
>
>Thank you.

If you boot to the XP cd aren't you given options to do partitioning and formatting before you install the OS?