Hi Jason,
AS/400 systems include a feature known as Host Print Transform. The feature is able to convert the proprietary IBM spool file formats to HP PCL 5 format. According to this web page http://www-01.ibm.com/support/...amp;context=SGCZG6L, the Canon 6265 is supported by the Host Print Transform feature when choosing the *HP4 Manufacturer Type and Model.
This gives you a second option to investigate besides a third party IPDS conversion option.
Best Regards,
/Paul