Thanks Arne_bab...
Thats sounds an excellent idea to have two separate apps... in fact, I was searching widely for i2phex, and got only Phex, the only i2phex I'd been able to get is an exe, ans being on os x, I'm not sure that I could open it, even using mono... another solution could be possibly to open it on my virtual XP Pro, but then, I'm not sure it could be exported to the OS X system and work...

Isn't there some other format, for example in java, or maybe something made for some close Unix cousins like Linux, and that could be adapted with not to much trouble to OS X ?
Of course, it may already exist a mac version... but where ?...

waiting for more info, I will already try what comes out of the version you indicated on the link above, for Linux...