Sorry, bad Nikko! I am new to these and didn't know which to post in. :dozey:
In another post UniKorn wrote...
You can start with learning gtkradiant (
http://www.qeradiant.com) , the tools will be released this week and the jk2 editor will be similar.
Regards,
UniKorn
Mapper 4 Wired Lamp Studios
http://www.wiredlampstudios.com)