Support Rooting problems.. wont go past Samsung Screen.

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http://androidforums.com – I accidently installed the root before I installed the firmware now my phone wont start. So using CMW-based recovery I tried to do a factory reset. Now my phone wont boot past the first samsung screen before just turning off. I have no idea what to do or how to fix it.. does anyone know how I can get it to boot to download mode so I can install the 4.0.3 firmware then root it? (General)