I'm sorry I still don't understand exactly what you are asking for. I know it is hard to try use the correct terms when discussing what you are trying to do, but I know so many terms and so many have more then two meanings. And I can't begin to guess at what you are doing by your explainations.
There are no Image packs used for brushes in PSP. Do you mean a collection of brushes? Like we would sell in the store here?
You don't want to load them to use in your psp, but you want to create a zip file for others to download?
Are these brushes that you yourself created?
Did you make your PSP save them into a folder with your own name or did you allow them to just be saved into the default folder with all the other brush tips?
Oh I forgot which version of PSP are you using again?