Thank you Jon, I'll do another search on the files based on your latest feedback.

Thank you!

P.S.
I also run a big forum in Greece, about Mambo (www.mamboclub.net), so I know very well how it is to answer questions to newbies. Please let me thank you twice for your time and patience.

No problem, I was an x-cart newbie once too :D

I have been using X-Cart for three years and on some parts I am a still a newbie 8O :D

Like Jon said the $main is established in the PHP files and it is usually at the very bottom of the file.