Just create a new folder put the A1200 Hi and Lo files in there, then run the AOS23EHIDE_patcher.exe, navigate to the file folder and it will add the ehide.device to the ROMs
You still need to `Byteswap` both files before burning to eproms
Link to EXE below, it's in German but I'm sure you will work it out

https://mega.nz/file/k8pViCRb#25_sr7aPy ... XLOSMDAr9g