Oh. I thought you had the two OSes all ready to go and just wanted to know how to boot them. Glad you got it worked out.
1 gig of swap? That's a bunch.
You don't use it directly - whenever the system or apps need it, they'll write information out of RAM and onto the swap drive. It's basically temp and nothing to worry with. However, if it's all formatted and ready to go, you'll need to do 'swapon' at a terminal or xterm. Then add it to /etc/fstab
/dev/hda6 swap swap defaults 0 0
although for you it's probably /dev/hdb1. I think that'll do it. But maybe you've already done that - in which case, just don't worry about it. Do 'free' and you should see a line showing a gig of swap.
Usually it's just a swap partition rather than a whole drive and half a gig should be more than enough - I never really use any at all. So if you wanted, you could split it and have some free space for whatever. But having too much won't hurt anything.