htaccess problem

[CarlBac]

Hi,

been working in php and javascript for a long time, but im a complete newbie when it comes to htaccess.

how do i do if i want:
http://mydomain.com/mike (/)
to go to (but dont change the content in address bar):
http://mydomain.com/show.php?user=mike

and at the same time:
http://mydomain.com/mike/videos (/)
to go to:
http://mydomain.com/show.php?user=mike&page=videos

If i want exceptions, f ex. i dont want
http://mydomain.com/admin (/).
to go to
http://mydomain.com/show.php?user=admin
how do i do this?

thx in advance

>> CB