Another work in progress.. the idea is to support plain, encrypted or password protected zip files as well.
Are the packages set up in a particular way? Since it sounds like it's distinct from just regular old zips.
t3d gets confused and tries to read them both, leading to duplications and lots of 'this already exists!'.
The other is I believe there's some oddities with loading some resources like sound out of a zip, but I haven't tested that a ton yet.