Indi, you've gotta stop posting answers to DBC questions with DBP methods...
To check the ground height of a .x model, you have to make your own function.
It's relatively easy. To start with, just move the player object up above the heighest point on the matrix object, then move it down untill you get collision, then each loop after that, all you have to do is check for collision, if there is collision, then move the object up untill there isn't any.
If there isn't collision, then move the object down untill there is.
Hope I Helped...
Jess.

Team EOD :: Programmer/Logical Engineer/All-Round Nice Guy