so my second hd is hdb1...right? how do i then find it? is it under /mnt?
Yes. You can use the command "mount /dev/hdb1" or "mount /mnt/hdb1", or use whatever mount tool DSL currently has..I think it's accessed by a right-click on the desktop (sorry I don't know for sure, since I use a completely different desktop). Once it's mounted, you can access the files at /mnt/hdb1 through a file manager (dfm or emelfm) or a terminal.
As for using cdrecord to burn a new OS to disk, there should be an explanation in the wiki. I typically use the command "sudo cdrecord -dao speed=8 dev=0,0,0 myisofile.iso", but it will vary depending on your hardware.
original here.