Using a pc as router to an A1200 with mediator..

[Ilwrath]

So would i just plug my modem to my pc and then have a lead from one network card from my pc in to my amiga???

Yep, but the "lead" you'll need is a (RJ-45) CAT-5 Ethernet CROSS-OVER cable.  Not a normal CAT-5 Ethernet.

Then config up Windows, and you're all set.

maybe Windows has it built in nowadays? Anyone know?

Windows 2000 and XP have "Internet connection sharing" built in.  That should be good enough.  

[Ilwrath]

Well, we'd need a bit more information.  What OS are you running on the PC?  (If it's 2000 or XP, this is a really simple matter, if not, it's a bit more complex.)  What exactly IS analogx?  (just a proxy or a full NAT handler?  I've not used it, myself.)  What are you trying to do with the Amiga?  Just use a proxy to browse the web, or do you want it to have a more complete connection?  Just asking "What do I do" is way too open ended.  There are a million ways to set the hardware/software up.  We need to know what you have, what you want, etc...