Mambo 4.5.4SP3 to 4.5.5 Patch Installation Instructions:

Below you will find the steps to bring a Mambo 4.5.4SP3 system up to the 4.5.5 version.  This will NOT bring prior versions up to date.  You should first try to bring prior versions up to the 4.5.4SP3 patch level before applying the 4.5.5 patch.

Step 1: Backup your site (both database & site files).

Step 2: Take your site offline:  Site->Global Configuration->Site Offline (YES).

Step 3: Extract all files inside the patch into your Mambo installation. The files are organized in a hierarchy identical to your 4.5.4SP3 install. Let them overwrite the existing files.

Step 4: Bring your site back online:  Site->Global Configuration->Site Offline (NO).

That's it.  Patch complete.