Firstly, the search tool for this forum does not work well. "index.php" found nothing yet that term shows up in multiple forum entries. If the search engine is not hashing the entire message, it certainly should.
As I see is common (multiple entries in the forum and in many other forums on the web) for the latest version of wordpress, mutliple installation seems to cause an error whereby accessing the index.php file (the main blog page) generates an internal server error. No good solutions have been discovered. Some people have circumvented this problem by using version 1.5 instead. Does anyone know where I could get a copy of the older version?