I have just started to test the OpenERP v. 6.1. As we have outsourced our bookkeeping I installed only "eInvoicing & Payments" module to track payments.
If in future we decide to keep all the bookkeeping inside would it be enough to install "Accounting and Finance" module or the existing "eInvoicing & Payments" would interfere with it?
"eInvoicing & Payments" is designed to work along side the "Accounting" Module. Shouldn't be any issue if you later decided to install Financing, worst case scenario you would rerun the module setup wizards I think. I thought you couldn't do the einvoicing module without the accounting module anyways. Maybe thats only in V7.