You could try creating a file called old.php (make sure you have MultiViews on) and have old.php read the info in and act accordningly.
Here's an example of how I do it:
requested url is www.site.com/erp/something/smethingelse/index.php
$url = $PATH_INFO;
$url_parts = explode("/",$url);
array_shift($url_parts);
$cnt = count($url_parts);
$module = $url_parts[$cnt - $cnt];
$script = $url_parts[$cnt - 1];
if (!$erp["modules"][$module]) {
$msg = message(500);
$web_page = "messagepage";
include(buildPage($web_page));
} else {
include($module . ".inc");
include($req_script);
}