wrt54g stuck in "Management Mode"

I'm telling you what, my Calculus classes were easier to do than work with this stuff! LOL

I've been wrestling around with a yagi + wrt54g setup and I'm at my wits end. I didn't want to do it, but I finally gave in and decided to download that dd-wrt stuff for my wrt54g V6. I was following all the steps to a "T" and then I get "management mode" when I try to access the setup stuff.

Now I'm stuck in "management mode" with that router! On top of that, when I plug the darn thing into my laptop, I lose internet connection. ***!

Can anyone PLEASE give me an easy way to do make this router into a repeater, with instructions a 3rd grader can follow? Also, how the heck do I get it out of management mode? I followed the instructions but it still doesn't help.

HELP!!!!!!!!!!!!!!!!!!