Releasing Accounting Doc Issue

Hi,

According to My Client Requirements , They will raise the Billing Documents (VF01) but system wont Generate the Accounting Document they want to release the Accounting Doc with authorization

But if i raIse the billing documnet system automatically generate the accounting doc so i want to control that

and i want to give the authorization to another perosn to release the account

I have seen the option to release the account by using the T-Code VFX3

How to MAP into SAP for that requirement to stop the release account in VF01

Can any one guide me the solution