exes and portable file associations

[tiago]

can Portable file associations be set to open exes as if they were exes despite having a customized extension? I mean, set ".gnu" extensions to .exe files and when double clicking them they'll just open as normal .exes do not using any external apps. I'd like this to fool some virii out there which looks after file extensions, preferably .exes and such measure would allow me a certain extra level of protection, provided they won't read headers or other sophisticated heuristic maneuver.

[serendipity]

Usually command prompt opens such things, so tried it and works:
1) Select your renamed file.
2) and run this:
::run "cmd /C start <curname>";

[tiago]

works a treat. thanks!!!