Problems with param passing

I have a script written by someone else running ok on server1, but creating 404-s on server2... the problem is clear, instead of using a structure like http://myserver/myscript.php?var=value he uses
http://myserver/myscript.php/var/value ... for some reason it works on one server, but not on the second one... since the script contains quite some codelines, I would prefer to get it running by modifiing the settings of Apache or PHP (which one ???) instead of modifiing the script.

Does anyone know where to edit it ???

Its that on server1 URL rewriting rules are added in Apache. You can use mod_rewrite in Apache without modifying your scripts. Here are some helpful links abbout mod_rewrite.

http://httpd.apache.org/docs/misc/rewriteguide.html
http://www.sitepoint.com/article/910

First back up your httpd.conf

Then find these lines

#LoadModule rewrite_module modules/mod_rewrite.so
#AddModule mod_rewrite.c

remove the pound sign (#) and restart apache

I think this may work for you... Maybe?

RewriteRule /var/([a-z]+) /myscript.php?id=$1

If not let me know the values if they are number or text and I will try to get it for you. I have used mod_rewrite very little but I understand it