Ok, before I try to setup printing from my wireless connected notebook,questions

The wizards in both XP (the hard wired pc to my router) and in Vista (the notebook) are both pretty self explanatory. What I need help with, since this didn’t go to well the first time I tried it, is do I need to change any settings in my Linksys WRT54GS router and Comodo v3 firewall? I’ll post this thread on a couple forums for maximum input! Thank You!