Erm, if you're generating the pages yourself just rewrite things to output the HTML to a file. Or even if you don't want to change the CGIs just write a wrapper script which sets the appropriate environment variables ($ENV{QUERY_STRING}=q{foo=bar&zagnork=wubble};) and then runs the CGI and redirects the output into a file. Then you run your wrapper from cron and save the results somewhere under your document root.