Sometimes you can get rid of the mose by simply cleaning the throttle IAC and throttle body. None of the factory cures were completely effective.
You may want to check the FAQ section and look into the throttle hang cure which also tends to mitigate the moose. You may not want to apply it to your mom's car though as it sometimes causes a little cold weather cold start instability (read that as stall on cold start in the coldest weather). For many of us that isn't such a big deal, but it could be for a non enthusiast driver.
