ok either way your gonna have to have another working pc or laptop which i assume u have coz ur posting on here.
so im also assuming u have an xp disk as u posted ' I had tried to re-install Windows but it won't let me' earlier so follow instructions on the bart pe web site http://www.nu2.nu/pebuilder/
which r pretty simple instructions then wen u have your live cd/ dvd booted up find a way to back up your files.
i dnt know weather that supports burning to disk but u wud need 2 drives n e ways but something like a memory stick shud work but if all else fails it definately supports networking .
thats the free option the other option is 2 buy that cable i mentioned earlier plug your laptop hard drive into a desktop and backup the files that way i dnt know how much more detail i can give u on that 1 ?