Do you need to create pdf files or just print them (it sounds like you have the first covered and are just wondering about the second)? If you just need to print it then the the first reply had the answer:

AcroRd32.exe /t path "printername" "drivername" "portname" 
Initiates Adobe Reader and prints a file, whose path must be fully spe
+cified, while suppressing the Print dialog box.
[download]

I know it's not OLE, but it ought to work :-)

Also, there's another version of the Win32::Printer ppm in the Kobes repository.