Hi Petar,
You don't need "to install GeeWiz for visualization" for SCALE 6.3 and to be honest it is not possible :)
SCALE 6.3 has its own
Graphical User Interface, which provides and visualisation capabilities - FULCRUM.
"The major new feature in Fulcrum is the 3D visualization of geometry, including
results overlay capability."
Best regards
Alexander Yordanov
P.S.:
again the manual is clear enough :)
12.3. Running SCALE
SCALE is run by using the Fulcrum user interface or by invoking the
SCALE Runtime Environment, scalerte, from the command line. Note that
this release does not include the previous interfaces GeeWiz or
OrigenArp for running SCALE on Windows, as Fulcrum should be used
instead. Additionally, previous shortcuts like runscale are not
implemented.