Just keep reading and you will catch on quick. I didn't have a clue what i was doing when i started using crome but after tuning my car for a week or two I felt a lot more confident in what i was doing. As long as you have a wide band it is quite easy.
I'm running a chipped p75 and the ostrich. I had my car roughly tuned in about 3 days of regular daily driving to and from work, which is about a 10min drive. I've been having problems with the wideband input into the ecu when data logging with crome and the voltage will just rise to 3.8v but I just tuned by watch the gauge and slowly adding more fuel in the cell i was running in.
Here's a couple of things that I found helpful when I was getting started.
http://www.xenocron.com/install/CromeGuide.htm
http://www.moates.net/zips/crome/Tun...ME%20v1.06.pdf
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