Thanks a lot.
But this point i already knew, and did.
What i really need is to redirect the traffic from the old site to the new one.
If i wouldn’t use the main domain for another instance, would be easy using a 301 redirect, that would point both.
But since i will use, i think i will need to make an .htaccess file manually, wich will take me lots of work, since are about 5000 urls.