How to call search.php with keywords in URL?

[Areku]

What I want is to be able to do something like Google, so if i type in a URL like

http://www.google.es/search?q=vbulletin

it will pick the keywords from the q= parameter.

Vbulletin seems to take it from some sort of "cache" or table instead.

How can I turn something like

http://www.mydomain.com/forums/search.php?s=&action=showresults&searchid=250152&s ortby=lastpost&sortorder=desce nding

to just

http://www.mydomain.com/forums/search.php?q=keywordshere

???