To be honest, many Settlers IV sites have been dying these last few years... I've been thinking about making"security copies"of any interesting or important Settlers IV site, and offer them as a download or somehow hosting them, as some sort of"vault"... But I haven't been successful on finding a way to do it, yet.
Just so I know, what site where youg etting your guides from?
(Oh, and if it was german anyway, I would recommend trying Brainsworld. It's still one of the most well known german S IV sites, and offers some unique information on the game)
Funny you post now. Just this morning I found a site called Gameswelt which I had been using off an on but wasn't aware they had help for the Mission CD levels. To be honest I think the guy writing for that page might be on something because no matter how hard it is he likes to throw in "it's easy". :P I'll be reading and all of a sudden, "Now here is the easy part; you have 2 minutes to build a 200 man army from nothing and take over the whole map." Of course something is better than nothing and I've noticed a lot of the Mission CD seems rough at best, almost untested.