Compiling kernel and making world as non-root

[Alexander.Farber at t-online.de (Alexander Farber)]

Hi,

I'm a FreeBSD newbie, but have used OpenBSD for few years.

Is there a way to compile kernel and also to "make world" as 
a non-root user under FreeBSD (5.1/i386)? In OpenBSD I normally 
put "SUDO=sudo" into /etc/mk.conf and run "make build". Also
all /usr/src belongs to "alex:wsrc", not to "root:wheel"...

Regards
Alex