Stéphane,
There is no way to override the program file header in PxBasic, however more importantly you should
not be using PxBasic to develop/maintain commercial applications. It is intended for personal or educational use.
The following is an excerpt from the PxBasic license:
QuoteYou may only install and use your licensed copy of PxBasic in a manner that is not primarily or otherwise intended for or directed toward commercial advantage or private monetary compensation whether direct or indirect.
The full license can be found here (https://home.pvxplus.com/pgsrvr.pvp?pg=licenses).
PxPlus does allow the override of the program header and in fact uses the legacy [Pvxprg] header to preserve compatibility with older products.