Woot, my ebay cable finally came in! After hours and hours of trying to get the cable to work, cursing qikslvr and his family, I FINALLY got it to work. My biggest problem was, I could get RR to begin logging data from the ECU, but as soon as I turned the car on, I would get "invalid header" errors, followed by "Could not send ECU init". Took me HOURS to figure out what was wrong.
I have a very old laptop...so naturally, the battery is shot, and I was using a power inverter to charge it while I worked in my car. That's what was killing me. Every time I turned the car on, the inverter would get more amperage/voltage, and for some odd reason that must have been disrupting communication with the ECU.
After just letting the laptop use its handicapped battery, I've pulled several good logs, with no issue, whatsoever.
As for my setup:
$9 Ebay cable
The Tactrix cable drivers that come with ecuflash
4800 BAUD settings
3000ms min. timeout for serial send/receive
Romraider V0.5.1b
And a laptop that IS NOT plugged into a power inverter
Thanks for the writeup qikslvr - very helpful.