Filemaker to Entourage with attachment(s)

The goal is to have FMP build an invoice based on a customer's order, send them their invoice, and include a picture of each item they ordered.

I can make Filemaker generate an email within Entourage, and include an attachment that is defined by the record. So if they order part #123, they get attachment 123.jpg

Where I am having trouble is getting the script to include multiple attachments without defining several fields and a varialbe for each one.

attachment: variable1 & variable2 & variable3 & variable4

It works, but its brute force and would mean setting up the script with maybe 50 fields and variable, just in case the customer orders 50 items.

(see attached script)

FMP-MSentrourage2.txt