Well If you see in my signature, the overclock is by ClockGen, it automatically overclocks your RAM along with the CPU. Personally I don't think its any bad, it made my Dell run alot faster actually. ClockGen should automatically recognize your motherboard and allow you to make adjustments.
There are alot of software CPU overclcoking programs available but I find ClockGen to be the easiest to use. This is how I overclocked my Dell
First I got the programs I needed, I usually use SpeedFan to monitor the CPU temperatures, you can also use CoreTemp and RealTemp. CPU-Z for monitoring the CPU speed and the RAM overclocked speeds, great tool. Then for stress testing use Prime95, and O.C.C.T both are great programs. I find that Prime95 stresses more than OCCT. Its also easy to use. You want to make sure that your temps don't go too high, Pentium D's ran pretty hot
. Good Luck!