One of the method is to use WOS plugin(https://www.two-notes.com/wall-of-sound) in DAW or Audio App . You have to create wave file with impulse and bounce this file with plugin or use MLSSA (MLS) method (Aurora plug-ins for example).
With these methods you can generate IR from any plugin or audio hardware. Then you can convert resulted wav file with Cab Maker.
Hi! Probably I'm a bit late for this ( just 3 years lol) but I was wondering if you could share the process. I spent time on the web but cannot find anything! Thanks a lot!