i'm going to undertake a new music catalog project which will heavily modify the stock php-nuke engine. since its gpl'd, i'm worried that i'm going to be required to publish all of my mods and some stupid "competitor" will just copy the site verbatim.

i'm sure i can just get around it by coding all mods in new php files, and letting it interface w/ the existing php-nuke files. but how about the database? is the whole nuke db gpl'd, and therefore subject to disclosure?

this feels to be an "ask slashdot" question, but i'm sure at least the admins of the bbs have encoutered it before. thanks.