TS help: interpolated interior

I need help to finish producing an Interpolated Interior 
metafile.  Attached is a clear text version, but there is a bug in my 
'cgmconv' tool -- it won't convert the element.  Therefore I can't get 
binary.  (Also there's a bug with InterpInt in MetaWiz, so I can't go that 
route.)

If you can convert it, please let me know.

If you can't convert, but your editor can generate interpolated interior, I 
have also attached the binary.  The InterpInt should be before the Rect 
(250,250)(750,750) -- you will see in the CTX file.  It is a simple ramp 
from white in lower-left corner to black in upper-right corner.

If you think this test is too plain and boring, feel free to generate a 
different one.

Any case, let me know if you can help.

-Lofton.