In the codex, the instruction says;
To import from a WordPress export file into a WordPress blog follow these steps.
1. Log into that blog as an administrator.
2. Go to Manage: Import (or Tools:Import in 2.7+)in the blog's admin panels.
3. Choose "WordPress" from the list.
4. Upload this file using the form provided on that page.
5. You will first be asked to map the authors in this export file to users on the blog. For each author, you may choose to map to an existing user on the blog or to create a new user
6. WordPress will then import each of the posts, comments, and categories contained in this file into your blog
Well, we obviously have an antecedent problem in line 4. It reads 'Upload THIS file using the form provided on THAT page. Huh?!?!? What file? And from what page? Any help diciphering line 4 would be appreciated.