ACCESS 2000 has "Conditional Formatting" which allows formatting in ANY form view, including Datasheets!
Just highlight the control you want to change, then FORMAT, CONDITIONAL FORMATTING... you can set the conditions and what type of formatting you want.
Even better, you can then use the COPY FORMAT button (the icon with the 'paintbrush' next to PASTE, to copy the 'conditional formating' from one cell to another.
Try it! It will make you happy.