I resolved a postscript issue by applying two patches from the xerox.com site to my brand new xerox docucolor 242 with bustled EFI feiry X3eTY RIP (1 and 2)
Now I have a new problem specific to CorelDraw (both X3 and X4) printing to this RIP/printer.
To the best of my memory all docucolor and other high end Xerox devices were originally designed to operate with Creo work flows from a MAC environment. This rotation issue existed many years ago and still does to this day with Creo work flows. Some times even if you distill PDF Creo will rotate the output so I use the device independent driver and then Distill the PDF.
You might try not using the portrait or landscape feature, use the custom page size and ignore any portrait and landscape warnings.
A good idea, but unfortunately when I print to the full-featured Fiery X3eTY driver without the pagemaker PPD file it doesn't give me the option of the standard postscript custom page side dialog box but instead when I select postscript custom size it intercepts and enters maximum values which allow 11 x 17 to be entered only one way.
P.S. just to add the reason I want to not use the pagemaker ppd file to get around this problem is that when printing from photoshop or acrobat and using the Fiery driver without the PPD I get not only an easier printer GUI to make changes, but also I get the colorwise screen which allows me to quickly set the output profile and also the image shift option like so: (attached)
If I use the pagemaker PPD so the page doesn't involuntarily rotate in corel, there is no place to input image shift and the color settings are scattered and not nearly as well defined (e.g. no names on color profiles which makes it kind of hard...)
One other interesting thing is that I can print a portrait 11 x 17 page portrait with no rotation from coreldraw, whereas the landscape 11x17 page rotates 90 degrees... so if I wanted to group everything on the page, change the page orientation in draw itself to portrait, and everything on the page within draw 90 degrees and then print that would work... kind of a manual landscape for the fiery driver. But that would be a huge pain to do every time, much worse than having to navigate the pagemaker ppd file options list.