Lamebro, you need to learn how to convert something before you learn to script. Seriously. You export it from sketchup to a collada file (.dae), then import the collada file into milkshape. So yes you have to download sketchup. I doubt you can even script without copying a script and modifying it though. Learn to script off the top of your head before you go making add-ons. Eval console commands is not full fledged scripting.
Hi you're a moron
1) I would have to learn how to convert models if I had to do it and yet I can script just fine
2) Eval
is full-fledged scripting, as is the console. I've done some wacky stuff with eval including a miniature gamemode where you hold the left mouse button to charge, release to launch yourself forwards and slam into people at high speed to kill them. Took three messages to do. Fun times.
So if you're gonna say someone can't script you best just say that or at least verify your information.
Also fun fact: Bushido makes plenty of quality add-ons and he can barely script at all, he's just really motivated (most of the time) and knows a decent amount about the datablock values.