OMG!! :)
Maybe it's not too late yet:
do as nruddock said first: delete PMD files associated with broken PZ3 files (you will loose only morphs that way, all textures will be in place). Next try to open those PZ3 in poser if you are lucky Poser will tell you that PMD is missing and blabla and you just click what is needed to stop poser from looking for PMD (dont remember now what that dialog box says) and you get those csenes back - but no morphs.
If you are not lucky then.... well you can spend one night for looking for all textures inside PZ3:)