I downloaded a number of BXY files (filename.bxy) that contained Christmas art for Apple II Programs. In the example below I used PublishIt4 to import the individual pictures.
Anyway, the bxy files contained 24 pictures each but only 8 can fit on a 5.25 disk image. Here is a picture in CiderPress. You can also create a .2mg file containing all 24 files if you want. I created all 24 on a 800k.po file and then converted it to the 2mg. Works perfectly fine in the Virtual II Emulator as long as you configure Virtual II with SCSI drives. See earlier blog post on doing this. I think you can search on OmniDisk.
I used File, Open dropdown to view contents. Then, I selected the pictures I wanted. Next, go to Actions, Convert to disk archive. Following usual CiderPress actions, Name the volume, click OK, and then save file, use same name or different name. This gives you a filename.po image which I loaded to my Virtual IIe Emulator. Below is a snapshot of PublishIt4 printout of some of the pictures.