Menu icons on Benq-Siemens c81

I'm interested is it possible to change main menu icons on bs c81. I tried to open hide disk config but It's impossible. On siemens x65 and x75 icons are located in disk config. So I download and try with Open Disc,SiMoco,Vsfe... but I just cant open disk config. File Manager midlet see hide disk but can't open it. If anyone know how to do that please let me know. Thanks!