The greatest difficulty with using a windows keyboard on a mac is that the poistion of the command and option keys are switched around.
on a mac keyboard, the meta keys are from left to right
control
option
command
and then the space bar
on a windows keyboard, the keys are
control
windows
alt
and then the space bar
generally on a mac, control is used by the command line, the windows key becomes the command key, and alt is interpreted as option
so, to print using your windows keyboard,
you'd press windows-P
To type the accents, you'd type alt with certain keys, and for certain accents, the charcter to be modified
so
alt-` àèìòù
alt-a å
alt-e áéóú
alt-i âêîôû
alt-c ç
alt-n ãñõ
alt-o ø
alt-u äëïöü
alt-s ß
alt-9 ª
alt-0 º
Those are the keys that come to mind.