Hi Marcel,
I'm not sure why you think anyone would be able to answer your questions.
For the first point, surely the easiest approach is to take a copy of your ERP system and TRY to install the Plug-In. Either it is possible, or it isn't.
The second point of course depends totally on which functions you want to use. If the Plug-In does install, you could simply try the functions you need - a little like playing "Russian Roulette"!
Hopefully your organisation will see sense and apply the Support Packages.
Regards,
Dave