We are printing overlayed spooled files through HPT. It works, but quality
of images is very bad.

I made overlay this way:
First I designed page overlay in MS Word. Then I printed it through AFP
printer driver (tried all of them), and I uploaded that image to AS/400.

The overlay in spool file has bad quality. Like 100CPI or even worse. Is
there any way I can improve quality of images printed from AS/400 through
HPT? I also tried using image as page segment with same results.

Would Infoprint server improve quality?