Hard Drive Problems (Hitachi Deskstar 120GXP)

I purchased a 120GB Hard Disk Drive (HDD) some time ago and installed it as a secondary HDD for my 733 MHZ Packard Bell computer (running Windows ME). The BIOS would only let me format 31.4GB.

The HDD worked quite well apart from the limitation. However, I transferred the HDD to a Dell running XP (again as a secondary drive). The HDD is running perfectly well as a 31.4 GB Drive.

I really want to make full use of the HDD and reset it to 120GB. The BIOS will not give me any other options. I tried formatting it within Windows, ensuring that it is formatted as NTFS but no other options are available.

Does anyone have any ideas?