Probably the easist way to solve your problem is to go out and buy a larger hard drive that is usually on-sale at all the big stores and copy your whole hard drive over to the new drive.
You can do this by going to this website and downloading the program. Make sure you read the page carefully so you can register the program as a full program.
Otherwise you will get a time limited demo version.
Read the help files until you understand what you are going to do and then transfer your complete system to your new hard drive. Yo will enjoy 2 things this way. One, you will no longer be plagued with a lack of space. You will also have he room to have as many backup as you want. I personally backup to 2 different mediums on any information i want to save. I.E, to a second hard drive and to a DVDrom.http://www.vnunet.co...e-copy-personal
I have personally used this software to transfer a over 6 gig system from a 20 gig hard drive to a 160 gig hard drive with no problems. I am also planning to do the same thing with this computer i am using because i only made a 10 gig partition for windows XP and i am down to only 20% free space.