I finally got around to soldering more connections. The existing servo outputs used outputs number 7 and 6 on the PIC. The command to move the servos were something like this:
servo 7, 225
servo 6, 75
I plugged a servo into output 5, and found that using the code "servo 5, 225" actually worked! Looks like I wont be needing any extra code for more servos.