Hi Bad Mr Frosty,
1. transfer the ADF-file from the PC to your Amiga
2. write back this ADF-file on your Amiga to a disk
In the link below i tried to explain above proces.
WinFellow Website - Documentation
Another option maybe would be using Disk2FDI. I have no
experience with to program and i don't know if using it is safe
. You need two diskdrives in your PC system. The program can be downloaded from the official website at below link.
Official Disk2FDI Project Page