Login Screen corrupted after Login Change on FC5

[interp01]

Hi All,
 
I just installed FC5 on a Compaq Presario X1000 laptop, everything was
working fine until I changed the Login Screen.  When I reboot I see the
INIT startup but then everything goes fuzzy.  Im seeing some sort of
cursor but again its just a giant fuzzy square.  If I boot into single
user mode, what files can I change to undo this broken Login Screen?
Any insight would be greatly appreciated.
 
Thanks,
 
DK
 
 
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