boot problem after custom kernel

[Alain G. Fabry]

Hello,

After making some changes to my kernel and rebuilding (traditional way), my system does not
boot anymore. I tried to boot from the GENERIC kernel following the instructions in the 
handbook.

First 'unload kernel' followed by 'boot /boot/kernel.GENERIC/kernel', but it mentions
that it cannot find the kernel.

I'm trying to boot from the USB drive. If I go to the command prompt and verify currdev and
loaddev are set to disk1s1a, which I believe is correct.

When I boot the 'new' kernel, I get the mountroot prompt which asks me for a manual root
filesystem.

What can I do to boot my GENERIC kernel so I can rebuild from it and my system will boot
normal again.

Thanks,

Alain