Manually load blockchain of os x

[doobadoo]

Did a quick search but couldn't find the answer which i'm pretty sure some on has already answered.  I have 2+ accounts where i run bitcoin, obviously separate wallets.  Is there a way i can take downloaded and verified database and copy it over to the other account and tell the client to manually accept this as good and verified.  Other wise i need to run the accounts a long time to keep the block chains up to date.  But i should only *need* to do this once. 

What are the files I need to copy and what commands do i pass and how?

Thanks in advance.

The Doob