[The_Kez]

A custom movement system is not necessary for custom bodies. I don't know whether or not it would be better, I guess there are some advantages if you can pull one off that isn't bugged in some way. I'm using the default one for the server I'm working on and I don't see any limitations to it, there are ways to check for hackers and I can edit movement speed just fine. It might be half a line longer but I don't mind.

Anyways, If you removed the player body image of the player, the current player ani would still be set to walk so you'd just have to create a new gani file and replace the old body attribute with the new one I would assume. Then when the player logs in replace the anis.

That's my first impression of how it could be done, someone may have a better idea though.