Leopard (10.5) was the first release of MacOS that included PHP 5 support. However by default it is disabled.
To enable it you need to uncomment (remove the #) from the following line in /private/etc/apache2/httpd.conf.
#LoadModule php5_module libexec/apache2/libphp5.so
Then restart apache
sudo /usr/sbin/apachectl restart
The location to install Adobe CS4 brushes depends on the OS
- Mac: /Library/Application Support/Adobe/Adobe Photoshop CS4/Presets.
- Windows XP: [Drive]:\Document and Settings\\Application Data\Adobe\Adobe Photoshop CS4\Presets
- Windows Vista: [Drive]:\Users\\AppData\Roaming\Adobe\Adobe Photoshop CS4\Presets.
Copy the brush set (.abr file) into the appropriate Presets directory and they will appear as presets in the Photoshop (you will need to restart Photoshop before they show up).