LaserWriter Pro 810: MS Word, Embedding PostScript Code

I'm doing a mail merge in MS Word. I would like to print the first page of the merge on letterhead and the second page on regular paper. The "First from" and "Remaining from" selections in my LaserWriter 8 driver don't seem to be recognized by Word, so what I've been trying to do is embed PostScript commands in the header for the first and second page of the document. These commands would tell the printer to use a specified paper tray for each page. In the LaserWriter Pro Developer's notes I found the 'setpapertray' command, and, judging by the description for that operator, it looks to be what I need.

How would I embed that operator into the Word document?

Unfortunately, what you're trying to do is NOT possible. You were on the right track by trying to embed PostScript into the MS Word document, HOWEVER, the driver controls paper trays and thus overrides any tray selection when a print job is sent.

Basically, the print driver is treating the mail merge document as one single print job and is sending down PostScript code to manage the trays according to what is selected in the Print Dialog for that "one" job.

Apple engineering said that it would be very difficult to create PostScript code to work around this. Our only suggestion would be to see if other applications also handle mail merges as one large print job, or as individual ones.