"in-place", as long as you have the necessary prerequisites available.
Required software:
-* Web server with PHP 5.x or higher.
-* A MySQL server, 4.0.14 or higher OR a Postgres server, 8.1 or higher
+* Web server with PHP 5.1.x or higher.
+* A SQL server, the following types are supported
+** MySQL 4.0.14 or higher
+** PostgreSQL 8.1 or higher
+** SQLite
MediaWiki is developed and tested mainly on Unix/Linux platforms, but should
work on Windows as well.