Go through the guide. Then take your core voltage off Auto and set your memory voltage to factory recommended values. Change the System Memory Multiplier from AUTO to 2.00 (or 2.60 if that is the lowest setting). Then when you increase the FSB, the memory clock will rise in in proportion with it. At an FSB of 200 MHz, your memory clock should be at 400 MHz (520 MHz if SMM is 2.60).
Now start the overclock/test cycle.
1. The CPU will not go any faster, or
2. Core voltage reaches 1.45 volts, or
3. Load temps reach 70 C.
The stock cooler will be your first limiting factor. With just a mediocre cooler (all you will need), you should be able reach around 3.6 GHz. Some E5200's will run at 4 GHz with stability.