"in-place", as long as you have the necessary prerequisites available.
Required software:
-* Web server with PHP 5.1.x or higher.
+* Web server with PHP 5.2.3 or higher.
* A SQL server, the following types are supported
** MySQL 4.0.14 or higher
-** PostgreSQL 8.1 or higher
+** PostgreSQL 8.3 or higher
** SQLite
MediaWiki is developed and tested mainly on Unix/Linux platforms, but should