In addition, you have to remove printer related info from the report.
See Re: Changing printer from default Message #856526 for more info.

>
>When I change my platform from WIN98 to WIN XP. I stuck with Custom Paper size printing. Then from the FQA 'Enumerating printer forms under Windows NT/2K/XP' of Sergey Berezniker, I solve my problem of setting paper size.
>
>Mnay thanks to Mr.Sergey Berezniker.
>
>The above solution works fine with DOT MATRIX printer.
>
>Now a days I started using LASER Printer. And observed that, though I change the FORM ID programmetically in FRX file but it didn't work. Where as all printing are in form/paper size 'LETTER' (Default).
>