Splash Wave
Member
Basically save your SuperTools and collect junk (easier in NG+) if you're going to EX Mode the game to get the alternate ending (not really worth it unless you want to say you did it). Otherwise focus on stats that you think you like (range/damage) and slap special stuff (two times shot in a single round/burst fire, poison [which isn't that helpful, granted], etc) on the gun until you make it your own.
At the end of the game when Wayne asks if you want to name a weapon/armor, DO IT if you're going EX Mode.
Game Mechanics guide can also help. CTRL/CMD+F to "2.2" and go from there.
Much obliged! I never would have guessed I'd be talking about PE in 2012. Thanks, Sony.
edit: And I bought P4, but it's going to take 4 fucking hours to download.
@TheSeks: I probably won't need to fuck with the guide if I only plan on one playthrough, righf?