Hi:
If you are creating the URL in a CALL DEFINE, have you also tried a STYLE attribute override of JUST=C???? or put JUST=C on the DEFINE statement???
[pre]
DEFINE URLVAR / display style(column)={just=c};
[/pre]
I don't know whether this will work for images, however. You might want to open a track with Tech Support on this one.
cynthia