Hi Oleg,
Thanks for your reply.
The thing is that every single page of the SEM site is really a copy of the SEO one, except for some variations. It's prettly well programmed for handling noindex and canonicals, so in about 5 minutes I can dinamically set it so that every single page in the SEM site has a canonical pointing to its equivalent in the SEO site.
Isn't it too risky to do it on a full site scale? Won't google take it as a bad practice or something? We don't won't to do anything wrong.
Thanks again.