Forum Moderators: open
If this technique is going to work, I suspect you'll need to use <HTTP-EQUIV> type declarations, rather than <META NAME>.
Apache sets the Last-Modified record in the HTTP response header automatically. If you wish to override the info it sends for Last-Modified, try mod_headers [httpd.apache.org]. If you wish to generate your own HTTP headers, try mod_asis [httpd.apache.org].
HTH,
Jim