Convert-> AR Cust & AP Vendor: One Shot?

We need to convert all of our customers into Lawson AR. Our plans are to eventually use the AR->AP integration (as per AR48) -whereby AR credit values can be transported to AP for refund purposes. Lawson facilaites this AR->AP integration via "linking" an AR Customner occurrence to a corresponding AP Vendor occurrence.

Is anyone aware of an Lawson conversion/'integration construct whereby we can convert our customer base to both AR Customer & AR Vendor in one shot - which would include the necessary "linkage" between the two?