Simple changing of portable process name

First of all - Hello - this is my first post on the forum. Hopefully not the last.

I would like to now, is there any simple way of changing a name of existing portable app. For instance - portablefirefox.exe runs a process firefox.exe. That's obvious. But I would like to change names of this processes. Of course, simple change the name of firefox.exe will couse that portablefirefox.exe won't find and won't run an app.

Thanks in advance,

goto206