OpenBSD disable usb and isa port

just curious why superkayak can't boot default OpenBSD /bsd kernel
always stuck at hardware detection
it's also happen with installation kernel

and then know the culprit
i have to disable usb and isa port first before boot
by using "boot -c" at boot time and disabling them
after you can login to your box
lets edit the kernel (to disable usb and isa port )

# config -e -o /bsd.sip /bsd
OpenBSD 4.4 (GENERIC) #1021: Tue Aug 12 17:16:55 MDT 2008
    deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
Enter 'help' for information
ukc> disable usb
348 usb* disabled
ukc> disable isapnp
314 isapnp0 disabled
ukc> quit
Saving modified kernel.

# mv bsd bsd.old
# mv bsd.sip bsd
# reboot