Formatting numbers in Excel

I have MS excel 2003 on XP Sp 2.
I have regional settings set to show the digit group

like 00,00,000.00 in currekcy as well as in numbers.
I have set teh options in excel to use system

separators.
still, when I format ny digits as numbers or currency it

follows only 000,000.00
I want thousnad seperator only once, later digit to be

grouped in couples.
Any clue?
PLease send replies to "xxxxxxxxxx",too. thanks.
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