Anyway, just thought I'd share the mods I made for the PSP version last night. They are extremely basic but I thought I would give it a go with what I had (I'm still trying to unlock everything at the moment).
If anyone wants to download them, you *should* be able to find them under RGB Winston, RGB Ray, RGB Peter and RGB Egon for the cartoon versions, and Zeddemore, Stantz, Venkman and Spengler for the movie versions.
I believe you can also ‘remix’ anything you have downloaded, so if anyone happens to have all items unlocked, it would be great to see what you can do with it.
You can also see here some of the PS3 mods people have made:
http://community.modnation.com/en-us/creations/mods/search?q=ghostbusters&page=1