The mod_rewrite parms for this don't work for my site for some reason, although I know mod_rewrite works because I rewrite the www subdomain.

So... you can try this if you can't access your sitemap files from your vbroot folder. This is what I do...

(Note, you'll need access to cron to do this).

1) Remove the 2 line change to the .htaccess file from the instructions
2) Set up a cron job to run daily 1 hour after vbseo site map runs. For instance, I run my vbseo sitemap at noon each day, and I run this cron an hour later (1300 hours)

NOTE: Change "{vbroot}" to where your vbulletin forum is located on your server.

This copies your sitemap files to your forums root once a day at 01:00pm.