I tried to get some help in McPhat´s forum but found there wasn´t a support forum to fix problems.
This is what the normal exhaust hole in the rear of the E-jet looks like:

The Airline Pack I bought recently shows a different texture, this happens on some liveries by the way...
Blue exhaust and that blue thingy just below

And gloss black...

Since I didn´t get support from McPhat I decided to lean to the good ol´Simviation comunity for help.
Hope you guys can help. Thanks!
Cheerz.