Q : How do I record standalone instruments?

For example:

I have HALion 6 and iZotope IRIS 2, both running in standalone mode.
Now I want to record/sample IRIS 2 in HALion by using my MIDI keyboard to trigger notes/samples and auto-map recorded notes to separate zones. I’m pretty sure this is possible, but I really can’t figure out how…

Can someone please direct me to a tutorial or help me out on this? I have an RME HDSPe AIO audio interface (world’s best interface, I might add) and I’m on Windows 10.