3. never ever EVER throw cooked grenades at teammates, they could pick them up and suiside. 

I don't condone that either, but how about just don't pick up grenades? If a...

I had a similar problem trying to launch from the map's .exe directly. Sometimes it will work, but most of the time it won't. You have to launch from the UGX mod manager: Tools- Launch Maps- Find the map you wanna play- Launch, or Launch into Solo.  It will automatically boot COD:WAW ...