AOMD PO's on drive

[B964]

We have never used the AOMD PO function here but are going to start.
Looking into it I have been able to create PO's using IRE for stock order PO's.
Reading CDK info I'm a bit confused on the procedure for creating a parts PO attached to an invoice or RO. Does not seem to follow the CDK information.

What are you all doing to create a PO for a part?