how to use PHP 5.3.x or 5.4.x in MAMP

1. install MAMP (v2.2)
2. open MAMP Pro
3. rename /Applications/MAMP/bin/php/php5.2.17 to something else
4. ln -s /Applications/MAMP/bin/php/php5.3.27 /Applications/MAMP/bin/php/php5.2.17
5. open MAMP and select PHP 5.2.17
6. done