@yokos, mtas
Thank you guys to point me about the manifest.xml tip. Didn't know that, but I want to learn more so your comments are really welcome!
@rexcrieg
Have you tried with a visual executable, i.e. mrxvt? Just to be sure you have the shell script extension well installed. -- Sure it may be ok, but don't understand why you have those problems. Doing a shell that creates a directory is not to find that it don't works.
Really weird.