I would say start off with researching your MB and getting familiar with your MB's bios, finding an MB review should show you some bios screens that will be used for OC-ing and how to access them. Then start researching what others have achieved using the MB and CPU, the memory stuff is really minor imo..some go for benchmarks, but as long as you can keep it at DDR2 800-1000 range you'll be more than good enough for modern gaming and use.
What is your goal for this overclock? You have a pretty decent build, what I would do is get a baseline of temps and voltage readings, using programs like HWMon for monitorring, RealTemp for CPU temp monitoring, EVGA Precision for GPU OC and monitoring, and OCCT for stress testing. Run the 1hr standard test, that'll be baseline for your temps. I would also recommend cranking that ACF7P up to 100% fan speed, it's not very noisy at least the ones I've used weren't and it helps with cooling.
You should be able to attain some overclock from your CPU w/o increasing voltage and maybe even using less than it is now, but that's where the baseline will come in, what your CPU is under load is the important variable. What your temps are under load are the important ones to watch, idle temps aren't a big deal as long as the load temps are within a safe boundry.
It sounds like you need to so some google and thread searching to familiarize yourself beyond what the guides/articles here have provided you, which might take some time, but will be much more worth it than someone piping in saying "just change this to 400 and that to 1.50 and have a nice day"...you won't know what you did and what it achieved. I'm sure there are guys on here with experience on that board and chip that can pipe in and give some good info, but the best you'll recieve is the stuff you take the time to find and read through. But set a goal, nothing too crazy, maybe a 500MHz OC, on a core2 that's not crazy at all.
Also what do you expect to achieve with this overclock? Are you a gamer? If so, I'd recommend cranking the fan up to 60-70% on that GTX260, dunno what clocks the superclocked runs, but I've pushed many vanilla 260's up to 666/1435-1458/1300 quite easily, all going quite a bit further into the 700/1500 range. Get that FSB opened up a bit, get that cpu moving a tad faster, but if you're a gamer, and depending on the res you play at you might not need an overclock for good performance now tbh, you have no monitor/resolution, pc uses listed at this point.
I'm sure we'll get ya OC'd and stable quite easily, but knowing what your uses and goals are will also be helpful in recommending whether or not you even need to overclock, if you just wanna OC to check it out and try it out, that's cool, this place is for that too, that's how I learned.
