Need to add a new Company (Legal Entity

Hi

I am setting up a new Company and I need to add it to the extistng Ledger .

Tthe Ledger was upgared from R11 to R12,  and it already have 7-8 existing companies/Legal Entities on that Ledger, there are also existing data for those companies.

I will create a new LE in that existing Ledger and assign it t the Ledger

I would like to know if there are any special considerations that I should take into account, I am planning to add the LE,complete the Ledger setup steps by updating it...

In fact I need to just add the LE and add a new OU, other steps I will just press complete(should I do that or I should leave it as it is?)