HELP PLZ: NEO2-FR 4GB 1066 Ram probs

Question

Hello All. I need some help with a memory issue that I just cannot figure out. Once I configure my OC'd Quad Core CPU and 4gb of ram and actually get them running, I cannot turn off the computer and have it reboot successfully - and its not a CMOS battery problem. I used to be able to do this for the last year or more.
So I have 4gb of OCZ 1066 Ram in my MSI-7345 motherboard. I have a Q6600 quad core CPU. My motherboard bios is up to date (1.10). I'm well aware of how to overclock my CPU, and the requirement that I overclock the ram to get it running up to speed (I run it at about 1030 now...).
The problem I am having occurs when I power off the computer.
To begin with, this board is a real pain to get the 4gb of memory to even post. I can get it to work now, but its an annoying process of booting up three sticks (which always works), loading default settings, reboot, then I have to power off the computer mid-post (thats a trick I had to learn through trial and error), click in the fourth stick, and then it will go ahead and boot all four sticks, overclocked and everything. But, if I ever turn off the computer for more than a few minutes, it will not successfully post again. It did not used to do this.
(Are other boards this fickle with 4gb? Its such a pain that I'd happily spending money on a new MB if I could avoid this problem.)
Once its running, PRIME95 torture test, and MEMTEST v. 3.4 show all is well - no errors, my computer doesn't crash, its fine. I can leave it on all day running these things with no problems. So, I tentatively conclude, my memory itself is OK.
The problem is if I turn off the computer for any period of time longer than a few minutes (and basically always if I pull the plug for a minute or more before putting it back in), the board will not post. The error lights show a memory problem, OR, sometimes, a CPU problem - and sometimes it switches between the two. If I run through the process of setting up the four sticks to work, I can get it working again.
My computer did not used to do this. I had it configured to shut down for 10 minutes every morning before powering back up - and it was fine - and I want to still do this.
I recently RMA'd 2 sticks back to OCZ because one stick wouldn't post if it was the only stick installed - I assumed it was bad. BUT, of the sticks I got back, still, one won't post on its own, but it WILL post along with the others...and I get no errors when I run MEMTEST or PRIME95...
I don't think OCZ will allow another RMA of the same sticks - they'll think I don't know what I am doing and that I am breaking them - plus, as I said, I CAN get them all to boot, just I cannot get the computer to re-power up.
Any ideas? If you need more info from me, just ask.
Lastly, can somebody explain how I go about trying to flash an older version of the bios (1.8) when I don't have a floppy drive? Thank you for any help!
STATS:
CPU: Intel Q6600 G0 stepping (was running at 2.95 for a year - but with this recent problem, I step it back a bit, but it has no impact)
Motherboard: MSI-7345 (Neo2-fr)
Memory: 2 OCZ 1gb @ 5-5-5-15 / 2 OCZ 1gb @ 5-5-5-18 (I manually set the timing to 5-5-5-18 and the voltage to 2.3)
Video Card: GeForce 7900GT
Hard Drive: 320gb Western Digital
OS: Windows XP SP3 32bit
Power Supply: OCZ 700W

Answer 1

*deleted* - sorry, I reverted to BIOS v. 1.7, and thought that fixed it. But further testing shows it did not.