I forgot, i dont like the DDO either, like wolluf said it causes problems later when it either undoes itself or something happens that undoes it, either way there is trouble.
But, you can get a pci ide card these days for next to nothing, like $10, and use that card and get the full 20 gigs of hard drive. It amounts to installing the pci card and running the driver setup and then going into your bios and telling your bios to boot from it, thats all.
You can join a forum or 2 that specializes in buying and selling used computer parts and get a pci ide card for around $10, or even get a 8 gig hard drive for $10 or less and sell your 20 gig hard drive for $20, places like tech imo, anandtech, and a dozen others are good for that.
I hate to advertise other fora but this one doesnt have a buy,sell, trade section so i have no choice.
But for tech help, this IS the place to go, always, the knowledge level here is higher than any other forum i know of!
Good advice + great people = tek-tips