The procedure I have seen here is as follows:

Close doors.
Turn ignition from 0 to II four times in less than six seconds.
The door open chime will sound once.
Press any fob button once.
Turn ignition off.
Programming is complete.

This didn't fix the problem when my fob failed. However, below is an extract
from a post I made over a year ago:

"I had exactly the same problem as you with my '99 LX. After the above
procedure, the remote function of the key still didn't work, so I assumed
the key was broken.

I needed a CR2032 battery for a remote door bell, so robbed the one from my
key fob. Some weeks later I was scrapping a computer motherboard and
realised it had the same battery; I put the battery in my keyfob on a whim.

Lo and behold! The remote function now works! Don't ask for an explanation;
I don't have one.

That was over a year ago; it still works fine. If all else fails I would try
leaving the battery out for progressively longer periods of time.

BTW, all the above information has been posted in this NG a number of times,
and could have been found using the search function in Google Groups. This
might save you time in the future."

It's still working now, nearly three years later, still using the battery
from a scrap PC motherboard.

HTH

Chris