Inter-Company Problem

I have multi companies, around six. A large number of inter companies’ transaction is done daily. The problem is time consuming with data entry; i.e.: a sales transaction from company X to company Y, will be a purchase transaction in company Y. So data is being entered twice and we have to log-in/log-out. Is there any way to simplify or solve this case.

Wait for 4.0 (Q3)