a couple of suggestions to get the driver working under Vista (I don't own a
Samsung printer)
download the latest driver from Samsung website..  right click on the *.exe
file and select the "compadibility" tag and set it to Win XP SP2 and check
the box that says
"run as an administrator"  what this does is trick the exe file to thinking
that it's running on an XP system - the driver may then install with no
problems..

if that doesn't work my other suggestion is .. go into control panel in
Vista  select printers and when you click on "add a printer"  select
Samsung..  and there is a driver listed
for the CLP-550  while I agree that you have a CLP-500 and not a CLP-550  my
understanding is (and I could be wrong)  there is ONLY 1 core Printer driver
in XP & Vista
for all printers..  all the extra features like seeing how much ink you have
left on screen.. setting specific details are done through a mini-port
driver that links into the core OS print driver..

what this means (in english) if you select the closest Samsung driver (or in
fact almost any printer driver )  you should be able to get the thing to
actually print with no problems..  it may not
have advanced features like selecting from Tray #1 -vs- #2   but at this
point (or at least until March 2007) when vendors drivers for Vista start to
get mature..

you could also contact Samsung support ... (and if your able to get past the
1st level .. 3rd world country tech support people ) there may actually be a
Vista driver under development..  this of course comes down
to what your political standing is..  I happen to work for a VERY large
influencial company..  by contacting our internal contacts at places like
Netgear, Microsoft, Cisco etc. things get done.. unfortunately for the
average
joe this isn't always possible..