How to protect my own program modules for ABB robots?

[analogbody]

I made some interesting modules (libraries) for ABB robots and I want to protect them against copying and mainly against modifying. I want, that user could use my libraries but not touch it, for instances for his savety, but every programs are loaded from *.mod files and every mod's could be watched and changed. I know that is a way to make a module with a VIEWONLY parameter but it is not enough, becouse I can get it connecting through the FTP ordinary copying it and ofcourse change it. Please help me Hard task to do but I belive in You.

analogbody@interia.pl
Piotr Wozniak, Poland