As the code within this plugin is wrapped in a way where its inaccessible to outside plugins we're going to make a small change to open it up.
Follow these steps to make Ritter_MapTransform able to modify the collision mesh within AltimitMovement.
Locate the following line within your AltimitMovement.js plugin file.
( function() {
Located directly below the 'About' section of the plugin header.
Change it to
//( function() {
Next go to the very last line of the plugin file and comment it out as shown below.
For now this is a simple enough way to allow external plugins to modify the needed objects. I may get more creative in the future if any problems arise from this method.