This is the procedure to save the embedded IR in the presets with non factory cabs.
1) After you imported the preset save it immediately , AX8 will ask you where to save the CAB from Scratch Pad,
Click on “Scratch Pad 1 area and select user memory location (i.e U060)
2) come back to the preset, select CAB Block. You can see it is selected Scratch Pad Memory 1. Thank you have to select the User Memory location where you have saved the IR (i.e. U060)
3) check the preset than save it!!