I will post a link below that shows you how to do the 2001-2005 models. So many people said you could not do this on the 1998-2000 models, but this is not true!
My car is a 1998, and instead of a wrench and nut needed to adjust the 2001-2005 models, I just used two wrenches.
I used the biggest adjustable wrench I could find at my hardware store, I think it ended up being around 2". The other wrench I used was somewhere around 1".
My car is lowered 1", and it was very easy to still crawl under there to do this. It took me maybe about 5 minutes, not including test drives in between different tightening levels. Excellent adjustment to do.
You can let me know if you have any questions at all.