[newbie] user icon and password at login..

[jiten]

i just installed LM 7.2. pls tell me how to solve following problems.

1. i don't want the icon of user to be displayed at login screen. how do i
 change this default setting.


2. when i enter the password it shows me the stars  whereas i want
nothing to be displayed at login screen 

thankx in advance  

--jiten