It was very easy. How? I needed to create a package with the library that corel-kde (or similar =) ) needs. The corel package depends on a "libapt-pkg2.5" or someting, that is provided by the Corel included apt. By providing this package in potato we could make posible for Corel users to upgrade. Let's do it! (I'm not with that machine now, so I don't have the data know, so I can't be more specific...)