I'm sure i've seen the solution to this but i'll be darned to find it again, after an hour of searching i'm going to ask... :)
I've got wpmu installed and working peachy in my root folder home/xxx/public_html on a shared host on domain primary.com
I have moodle installed on secondary domain secondary.com in the folder home/xxx/public_html/learn.
I have one file located at secondary.com/files/index.php which gives me an apache 500 error.
I'm guess i need to add a re-write rule to my wpmu to bypass these rules:
RewriteRule ^(.*/)?files/$ index.php [L]
RewriteRule ^(.*/)?files/(.*) wp-content/blogs.php?file=$2 [L]
in order for /learn/files to be accessible? man i wish i could find that post....