This example is based on Wordpress but applies to any other query string eg.
http://wordpress.com/?p=55
If you want to manually redirect that p=55 to /some/other/url how do you do it?
RewriteCond %{QUERY_STRING} p=55 [NC]
RewriteRule .* /new-url/? [R=301,L]
You can change the p=55 to whatever your query string looks like.
Remember to keep the "?" at the end of the new URL unless you really want the query string to stay alive, but this will cause problems for many websites including and especially Wordpress.
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