Make sure the MP kernel is installed by "cp /bsd.mp /bsd" or is there another better way?

[Tinker]

Hi,

What is a recommended way to ensure that the MP kernel is installed 
really, "cp /bsd.mp /bsd; reboot" because the bootloader always loads 
the "/bsd" file?

Or is it more advisable to echo >> something to /etc/boot.conf or the 
like.

Thanks!
Tinker