Hi Kinuasa,
Thanks for having a crack at this. What you are suggesting is to step outside the flow altogether which defeats the purpose of having the control of the flow.
I have discovered the answer though:
eg/ EXECUTE [yourQueryNameHere] "Some Text Value"
The values that you place after the [yourQueryNameHere] need to be in the order they are specified in the query (the one you are calling in MS Access). The data types should also match.
eg/ EXECUTE [yourQueryNameHere] "Some Text Value", 123.45, "Another Text Value"
I hope this helps anyone else looking to execute queries, particularly parametised ones inside of MS Access.
Cheers
MisterH