My Logon Page

Does anyone know the in depth details abt the file:

com.sap.portal.runtime.logon.par

I need to modify to make it look something like this:

http://www.mycareports.com

Any guide that only explains clearly abt this par file?

I din find forum details much useful to completely edit the page..Itz juss not replacing the image but also extra images and extra text i want to add to it.

Also it has this line everywhere:

logonLocale.get(.......);

Can anyone explain how to find this function?

Thanx in advance!

Message was edited by: Naresh kris