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you should log onto the dsmlink forums there is a lot of help on there. I just bought v2 and am gonna do all my street tuning with some help once my car is back together
I wouldn't call myself a guru but I know a thing or two about it. I've been tuning mine and my friends car with the link for over a year now. We both have 2g's but I'm sure the 1g link isn't much, if any different. Once you get a basic grip on it, you'll find it's a really simple system to use.
Like bigredd stated, there's tons of info on the link's forums.
Let me know if you need any help.