ulimits for users v root

["Bruce O'Neel" <netbsd%pckswarms.ch@localhost>]

Hi,

I'm trying to get sbcl (www.sbcl.org, it's a lisp system) running on 
NetBSD/sparc.
No, not sparc64, that seems to work, but sparc.  It's almost there but I have
to run it as root since sbcl likes lots o' memory.

When I run as root I can increase my ulimit's -m and -d up high enough, but,
I'd like not to run sbcl as root.

Surely there is a setting which let's me change a default user's limits.
Should I look at login.conf?  Or ??

Thanks very much in advance.

cheers

bruce