[robbak]

Basically, work out where securelevels have been set, adjust that setting, and reboot. Provided your security-paranoic predecessor hasn't also locked that down.....

The general way is using rc.conf. there are two securelevel settings there:

 kern_securelevel_enable
                 (bool) Set to ``YES'' to set the kernel security level at
                 system startup.

     kern_securelevel
                 (int) The kernel security level to set at startup.  The
                 allowed range of value ranges from -1 (the compile time
                 default) to 3 (the most secure).  See init(8) for the list of
                 possible security levels and their effect on system opera-
                 tion.

Best of luck......