PC Specs:

AMD 6000 3.0GHz
4GB DDR2
8600 GT 512 DDR2
320GB HD
Windows XP
Asus M2N-SLI nForce 560 Socket AM2 Motherboard

Ok so what im wondering is, depending on how much i overclock, how big of a temp change will it make?

Right now i idle at about 30C....If I do some OCing, how much will that rise? If its a ball park estimate thats fine with me, just wanting to know from some experienced OCers

well i know absolutely nothing about OCing & i just OC'd mine from 2.8GHz to 3.0GHz & had no change at all using a stock heatsink/fan

I'm assuming you are using a different CPU then me. So that would make a huge difference. Not every CPU cools the same.

Temp rises according to voltage increase mostly, although obviously increasing speed also adds to the heat. But your voltage setting has the most direct affect.

The big thing is to look at your current idle temp, and your current 100% max load temps.

I've got a way different CPU, but I'll use it as an example. My Q6600 is considered a 'hot' CPU. At stock (2.4Ghz) my cooler keeps me around 48C-50C at max 100% load. If I OC to say 3.2-3.3Ghz I max at about 65C @ 100% load.

OC'ing is about trial & error. But the temps you need to be thinking about are your 100% load temps. You could OC highly and have an idle temp that's fine, but once you start gaming you could get way to hot. Inch your way up and monitor load temps as you go. Just find the highest OC you can get to run stable, but keep you at a safe load temp.

Your CPU and Heatsink/cooler will obviously be different, so it's gonna vary.

There's no simple formula for predicting temperature increases. It depends on many factors. Which heatsink you use, which paste, even paste spread, if you have your cpu and heatsink lapped, type of case, type of case fans, airflow, temperature of your room. You just have to try it and see for yourself.

What programs are there to use, to stress test it at the beginning, and see what your 100% load temp is

Speedfan for temps
CPU-Z to check stats
PRIME95 to stress test