Like this in your StartUp-Sequence :
Loadresident force exec.library_45.24
SetPatch Quiet
Cpu fastrom
I couldn't get this to work. My A4000 went into an endless reboot cycle with a yellow screen.
I fixed it though by using this:
LoadModule Libs:exec.library_45.24 NOREBOOT
StepPatch SKIPROMMODULES scsi.device, exec.library >NIL:
Worked a treat after that.
Weed