Friction?
I'd like some of my objects (which are angled) to force you to slide off to prevent you from trying to exploit the map.
I was thinking I could do something like, trigger_push but that might get messy, I just want the objects slick like Ice.
any suggestions?
Well in HL2 there is a material showcased/used in the "sewers" maps. If you completed HL2 (Org) then you should know what i'm talking about. Portal also used this material in the last map (escape_03). The material i'm talking about is a slippery "slum" surface that's almost feels like walking on ice.
I'm not sure this would work the way you want it to, but check it out.
- Nezerv
if they dont make the jump, id rather them slide off the ramp then be standing there
It doesn't need to look slimy. It's just a texture, but it has some special values/code in its .vmt file and that is what makes it slimy. You just need to make/take any texture you want, and add those values to the .vmt file for your texture.
If you want, i can help you out with this. Just send me the texture you want to be slimy and I'll take care of it.
- Nezerv
Notepad will work just fine. In fact, it's probably the program that works best with editing .vmt files. Just don't use MS Word or such "advanced" programs, it won't work. Anyway, I've no idea about what you're talking about regarding the .rad files 
But if it's anything like scripting/coding then you'll do just fine i think. .vmt editing is really simple and easy. If you want to know more about it or learn on how to do it yourself, visit http://www.interlopers.net/index.php?page=tutorials&cat=Texture_Creation
There you'll find plenty of resources on how to create .vmt files and .vtf files etc.
- Nezerv
It's not the general "settings" of the .vmt that affects the friction really, it is it's surfaceproperties. mudfloor004b uses dirt, which for example, has a friction value of 0.8 to name one of it's values.
- Nezerv
this is just plain stupid that they have no func_friction which I think they had for HL1 -_-