uri segment 3 without index.php in the uri/url?

[eluser]thesocialhacker[/eluser]
if some one could go over the :any routing like "$route['(:any)'] = 'whatever/$1';"

i simply want to pass GET using uri segment with out the user typing index.php - i don't care what the url's look like while the users following links.

also- if i mess around and just put "$route['(:any)'] = 'whatever/$1';" other aspects of the site will break, such as login, and other POST related stuff...

also also- i'm thinking that maybe i could add each user to the routing individually, maybe in autoload.php or something? just an idea...