When bringing over the supplier and customer data, can you make it so it brings over the default nominal codes for each customer and supplier too.

At present, when a conversion is processed, all the data transfers perfectly, except it omits which nominals each customer and supplier if defaulted to. This means I have to go into each customer and supplier and apply a default nominal which is very time consuming. Sales usually works out ok as most businesses post tot the same sales nominal, but suppliers is very time consuming to put right.