In reply to:
I am at 91% disk space and I don't renew til Feb of 2008.
Wow! That's pretty amazing; I visited your site and I'm surprised that you are using that much space. 
In reply to:
DH can't add diskspace so they told I could start by zipping home/xxxxxxx/backup/archives (about 15gig) but I don't even know how to do that.
Well thats not gonna be *that* simple, as you can't just zip the whole directory (it's too big). Does home/xxxxxxx/backup/archives have subdirectories beneath it?
The general process for backing up is described pretty well on the DreamHost wiki, but you won't be able to throw that whole 15GB into a single zip or tarball, so you will have to develop another methodology (which is why I asked the question above) 
--rlparker