I just would like to know if their is a way to limit technologies ingame so that you can stop everyone from teching up from a certain point. Like limiting it to swords and arrows or muskets and cannons.

I haven't found the option in vanilla CIV4 so i presume i would need a mod to do that unless i missed it. So please direct me if you know.

Welcome to the forums. :)

If you want to stop civs using certain units (musketmen, tanks etc), just go into UnitClassInfos and change the instances to 0.

http://img217.imageshack.us/img217/7961/unitlimitssj7.th.jpg (http://img217.imageshack.us/my.php?image=unitlimitssj7.jpg)

Thats from BTS, but it works on Vanilla aswell. ;)