@dansteg We had a similar need for cash sale PDFs and came up with a very low cost way to achieve it. We created an alternate Cash Sale PDF template, then created a new Cash Sale form (not preferred) and set it to use the alternate PDF template. Then, we created a custom Transaction Body field of type Hyperlink, with the default value:

<https://ACCTID.app.netsuite.com/app/accounting/print/hotprint.nl?regular=T&sethotprinter=T&formnumber=456&trantype=cashsale&id={id}>

You'll have to modify two parts of that URL to make it work, replacing the

formnumber

with the internal id of the new Packing Slip form, and replacing

trantype

with the value that is in the URL when using the standard print button to print a Packing Slip.