how to change the logon page text colour?

Hi experts,

I need to do 4 changes in the logon screeen

1.the "user name" and "password " to "User Id" and "Pass".I have changed this in "umelogonbase.jar".

2.Change the colour of the two texts(white colour)

3.with black as background for the userid and pass label and textfield in the left side of the page

4.Also the background of the screen of the logon page with a company pic ;

I am following the below

http://wiki.sdn.sap.com/wiki/display/EP/ModifyingtheLogon+Page

Kindly help in this

Naga