Like making Yoda and Jawa small, and Desann big.
Is it possible to do this, or do I have to wait for a mod?
Until the MP sourcecode is released, this is impossible...
you can try adding a scale xxx entry in the NOC file. It works in SP but as Prime said the SC will be needed to do it in MP.
:( Ok... I guess we all just have to wait for the source code...