I assume you are talking about the biz-directory script.
Yes, G,MSN&Y crawl these links, but it's far better to use a mod_rewrite module so your dynamic links turn into static links. They'll index/crawl much better.
You can use this:
Code:
RewriteEngine on
RewriteRule ^([0-9]+).php$ index.php?c=$1& [L]
RewriteRule ^([0-9]+)add.php$ add_url.php?c=$1& [L]
put this into .htaccess, then change the links in your php
Code:
$category_url = $dir.'index.php?c='.$parent_categories[$x]["id"];
into this:
Code:
$category_url = $dir.$parent_categories[$x]["id"].'.php';
or check this forum
http://mod-rewrite.com/forum/thread45.html