I recommend you just follow the manufacturer's ratings, except for tRAS (or Cycle Time (the last line of the four adjustable timings, can't remember exactly what it's called in this BIOS)). nForce2-chipsets usually run best with a tRAS of 11 (for some unexplained reason). Don't worry about screwing up your memory - timings can't do that. If they are too tight, it will just cause your computer to hang and then you just reset your BIOS and try something different. Only exposure to very high voltage over a long period of time can really do damage to your sticks. But on the other hand, one shouldn't set the vDIMM higher than necessary. Did newegg say anything about rated voltages?
Your sticks are probably double-sided, which means you should use a CPC-disabled BIOS (modded version). This could be necessary to make them run stable. There must be tons of modded BIOSes for NF7-S 2.0, and you'll find a lot of help in this forum. Just remember that when flashing a new BIOS, you should be totally convinced your system is stable. No need for insane overclocking when flashing!
