http://www.map-craft.com/May that become your temple where you pray for your maps.
All you will ever need.All you will never need.And everything else.
Plus,the guys are great,you can ask them anything,WITH the exception on how to decompile a bsp back into editable map.
And don't you ask me how to do it,because I won't tell you.
Hopefully,you'll never need it