port 80 on unix

Hi!

I tried to set Jigsaw 2.0.4 to port 80 under solaris. But I failed.
I read the FAQ and tried again. But I failed.

I must say, the FAQ didn't help me much. I started Jigsaw with -user
[myusername] and -group all (btw: is it ok to use group "all" ?). Jigsaw
starts up fine , but I don't get port 80 working.
The FAQ says something about a "relevant piece of native code".  Sorry,
but what piece of code ?

I hope you can help me.

(btw: sorry, but it is the first time that I set up a webserver)

thanks for your effort
    Oliver