Right but how would those ice events work?
Do you even know what events are used for?
Do you see events you put on bricks to make water or vehicles?
No, but you can put those events on a 'vehicle' brick, which is a 8x8f with no option of placing on the top. Those don't fit everywhere do they? (although even if it did, the vehicle wouldn't fit :P )
-_- ok, I have to admit, I can't really answer a lot of those questions(except for what are wrench events used for, of course I know that -_-) but I'm just saying, make an event that makes your person slide across things, okay? I don't know anything about creating add ons or things, so I don't know how they would work, except just make it like you make fake kill bricks and such, wrench it, and then there would be an option right there, "Ice Brick", or you could make it somewhat like an add on that came out a little while before V9, where depending on what the brick was like, it would do something.