Stef,
Are you perhaps running into problems with mapping category names to packages? The Dolphin approach to that is to avoid the topic: just present a list of packages and make the user pick one, after which the class/method/etc. is packaged. The resulting package system might then suffer the indignity of cyclic prerequisites, but there are ways to help the user fix that. I am not saying it is the correct solution (nor suggesting that it is not) - just reporting what Object Arts did. They got so many things *really* right that I default to trusting them.
This is what my implementation does. No magic matching. Just a list of classes and methods. Now if I do not support the * convention of packageinfo it means that we will not be able to load and save packages in a compatible form. We could do that and it would save me a lot of work. But people have to agree and understand the consequences. Of course we could do a MCPackageInfor specific loader that loads and convert MC packages. But this means that the packages will not be able to be used in Squeak. Stef