I don’t believe that mod_alias can access the {QUERY_STRING} variable. To be sure, I’d fall back on “good ole” mod_rewrite:
[code]# .htaccess in DocumentRoot
RewriteEngine on
RewriteCond %{QUERY_STRING} page=free-webmaster-tools
RewriteRule ^misc.php$ webmaster-tools [L]
… for the other query strings[/code]
You might benefit from reading the mod_rewrite tutorial at http://dk.co.nz/seo as it contains explanations and sample code. It’s helped may members and should help you, too.