Thanks for the reply. Indexer.php is actually contained in the download above, and I have it working. However, issues are twofold (bearing in mind I am an all-but-complete newbie at this).
1) If I create a page (rather than post), then that page is not displayed as part of the blog, but it its own page. I'd like the listing to be displayed like the blog posts.
2) The listing is not recursive (is this the right word?). It's fine for listing 100 files, but it doesn't work when the directory in question has sub-directories.
I want to use the webpage created to deliver company news and information, and this involves offering a large number of files, which need to be sorted by directory (there are 6 languages for each file, for example).
Any ideas how I can get this working? I have my pages designed and ready to go. Displaying the files as they are organised in a directory as part of the blog pages is the last thing I need to do, having got the rest sorted very quickly and easily.