Your nick looks like joke with this kind of question :)
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> Date: Thu, 11 Nov 2010 13:00:57 +0400
> From: open...@e-solutions.re
> To: misc@openbsd.org
> Subject: Upgrade a firewall
>
> Hi,
> I use OpenBSD 4.7-STABLE at work only for firewall(PF, isakmpd,ipsecctl).
> Now i want to upgrade it to 4.8 RELEASE.
> So, i done :
> Boot on 4.8RELEASE CD, choose "Upgrade at prompt".
> Follow instructions, and finally "reboot" the box.
> After migrate /etc and /var : sysmerge -s
> ftp://ftp.openbsd.org/pub/OpenBSD/4.8/i386/etc48.tgz
> I'm wrong ?
>
> Thanks for your replies.