I loaded the ZIP driver on my harddrive from the Squirrel Zip disk I bought years ago when I was still using OS3.1 on my real A4000. When I upgraded to 3.5 and then 3.9 it was there and worked.
As for WinUae, when I put my Amiga drive into my PC machine under WinUae since the Zip drive was already installed on my PC I was able to select it in the WinUae configuration just like a CD-Rom using Add Dirctory under Hard Drive. WinUae loaded and it works fine reading PC formatted ZIP disks but it will not read Amiga formatted disks like it did when evderything was in my Amiga. Before the scsi controller in my Amiga stopped working the ZIP drive would read both Amiga formatted disked and with CrossDos it would also read PC formatted disks.
It would be nice to get it to read my Amiga disks but I have acqquried another scsi controller for my Amiga so when it arrives I will get the A4k back together and get my data from the Zip disks.