Memory dividers..where to start?

I have a 2.4C P4 running at stock 200 mhz.

The mobo is a Abit IC7-G with the latest Bios.

I want to start to OC the CPU but was unsure where to start with the memory divider. Right now it's at 1:1 and my options are 5/4 and 3/2.

I am running two sticks of 512mb Corsair XMS PC3500 at 2-5-3-2 which is the most aggresive timing that is stable under Prime95.
The Vdimm is at 2.65.

My Vcore is still set to default. I was planning to start to increase the FSB in increments of 5 mhz. Right now the multiplier is set to 1:1. I think I can get the CPU to at most 270 mhz.

I am using an Alpa Pal heatsink and a Blue LED fan ny antec on the CPU.

My question is when do I need to change the memory divider manually ( or do I even have to .. is it automaatic?)

I was palnning on incrementing 5 mhz at atime and testing the FSB to see it was stable... right now the memory divider is at
1:1. When does the memory divider need to be increased to 5:4
with the overclock process?

As always thanks for any help and advice!

I would also like to know about this Maybe, like.. What and where do I find these memory dividers?....

You'll find the settings for your memory dividers in your Bios.... 1:1, 5:5, and 3:2 are usually the defaults available in most memory Bioses. If you're running stock with DDR 200 mhz PC3200 and a 200 mhz FSB then the default is 1:1.

If you're going to overclock and you're going to run your FSB and memory out of spec then you usually need to increase you're dividre to something like 5:4 so that your memory dosn't run to fast. At 1:1 you're FSB and memory are running at the same speed. If you left your memory divider at 1:1 and increased your FSB to 270 , your memory would crap out b/c It would most likeley not be able to run at that speed.