that video card, x200 is not supported by current ati driver afik, ati dropped support for this card and many others in 2009 if i remember correctly
the most recent driver supporting it is 8.18 but i could be wrong on this, this driver won't work on pclinux because it is not compatible with current xorg version we have
for this video card you have, you must use the free version driver, x1950 and earlier driver available on pclinux control center
for multiple monitor all i can have with the mentioned driver is clone screen, extended desktop on second screen doesn't work but i have a 9200, practically the same card you have but older technology so you might have better luck