how can I rewrite URL to fancy url?

[SweetnSour]

when my user logs in, I want the get variables that were sent rewrote onto the URL like so:http://mysite.com/mygetvar1/mygetvar_value1/mygetvar2/mygetvar_value2/ormysite.com/mygetvar1=mygetvar_value1/mygetvar2=mygetvar_value2/How can I do this?Please help! Thanks!