If the battery is too swollen, this becomes a challenge to perform as some screws don't want to get out. As much as I really, /really/ did not want to and felt a part of me die inside as I did, I actually wound up ripping the bottom case off of the last three screws that just wouldn't get out (the battery's force actually caused one of the three screwholes to pop out of place, I simply bent the bottom case until the other two popped out.) From there on it was smooth sailing.
...Now to wait for my new battery to come in! (I could've had the swollen battery in there until the new battery came in, but honestly, I feel it's better to do without the Mac for a few days for the peace of mind in knowing I'm not going to have to worry about it blowing up or something of the sort at any given moment ^^") I'm going to feel so cool if this all works; I picked up this Mac for just $100 because of the battery swelling issue.