Just been to Dimas w/i the last month and going again on
Wed.
They updated the Dimas site to show hours and it now has
some english in it! Yippee!
http://www.dimasaruba.com/
They take the "tourist extensions permit" after 2:30 - it's a
first come first serve deal. Be prepared for a wait....
I would take the dimas site and put it thru the igoogle
translator from dutch to english - it helps a lot!
They do have the forms on line - but do not know the specifics
on what time frame you have to apply for the extension.
If you need more help - PM me and i'll see what I can
do for you.