You can update to 4.1/4.2 from the recovery menu without a modchip if you have a retail disc with 4.1/4.2 update on it. NSMB or SMG2 have these updates, and others.
Also, don't update if your not sure it is bricked from a theme. You probably have cioscorp installed from softmii. You could try to burn and boot MMM-250.zip
I would do this first. If it boots, follow the softmod guide below using the modchip method to install HBC, bootmii, etc. This will have you update to 4.1 which would fix the theme brick and install priiloader before your down. This way, if reinstalling the system menu does not work, you still have other options.
Last edited by mauifrog; 09-23-2010 at 06:43 AM.
Ipsa scientia potestas est.
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and thanks for all your help ive burnt the above disc but still nothing i guess i will have to order nsmb from the states and pray it works
Just a warning however there's a decent chance the game update will work.