On Friday 22 December 2006 01:06, Mike Doty <kingtaco@gentoo.org> wrote 
about 'Re: [gentoo-amd64] Switching form non-multilib to mulitilib 
profile?':
> Jakob wrote:
> > I've just finished my gentoo 64bit installation.
> > While installing I've choosen a non-multilib profile, but now I think
> > it will be better to run am multilib system. is it possible to change
> > afterwards or is it better to install again.
> No easy way to do it short of reinstalling.

Well, Mike's probably a better source than me, but I thought the multilib 
<-> no-multilib switch could be done with a simple emerge -e world.

-- 
"If there's one thing we've established over the years,
it's that the vast majority of our users don't have the slightest
clue what's best for them in terms of package stability."
-- Gentoo Developer Ciaran McCreesh