[joaquimandrade]

Bugsy, if you are still interested in this:

I have been playing with it more and with AddToFullpack and setting the entity movetype to MOVETYPE_NONE I managed to make it.

Problems: going through ladders or barely walking with cl_bob bigger than 0 makes it move (And I doubt that it can be fixed). Still, if you want to use it in clients without speed it works fine.

Edit: I mean stairs not ladders