freebsd stable - Apr 2005 - FreeBSD and ProPolice Smashing Stack Protector

Hi,

does anybody use ProPolice Smashing Stack Protector for FreeBSD
(http://www.research.ibm.com/trl/projects/security/ssp/buildfreebsd.html)?

Is this stable with 5.4?

If not what else can I use to improve security of my OS?

Best Regards,
p.