Welcome to the forum. First of all, there is no "chip", but DHP makes a reflashed PCM for the 3.4. It's available at
www.pfyc.com
Second of all, lose the IAT resistor. I can go into an indepth explanation of why you shouldn't use it, based on first-hand-experience and an engineering explanation, but I don't feel like typing that much right now. So if you really want to know why you shouldn't do the IAT sensor override, let me know. Otherwise, just take my word for it.
Third, I see you're wondering about other performance options. I'm assuming your young, and don't have much money, so here's some cost-efficent upgrade options, (seeing as how you already have a CAI).
1) Custom shop-done exhaust
2) FFP underdrive pulley
3) DHP PCM
This is assuming your on a limited budget, and are a relatively inexperienced modder. That, with your CAI, would bring you up to about 190 hp at the crank, with a cost of somewhere around 700$ for all 3 mods. If you want more info, or want to know about more expensive / complicated mods, let us know.