How to restore original Boot Loader, Radio and ROM ?

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I have two P3600i,
one is running factory settings (boot loader, radio and rom)
another one is running upgraded settings (boot loader, radio and rom)

however, the upgraded one is not stable
sometime it hang during loading of Windows
when the problem exist, it hang forever even I soft-reset
and the only solution is Hard Reset
within 5 days I already hard reset for 4 times

as a result, I would like to restore the upgraded one to original setting
is it possible to do? what are the steps?

just flash with original rom

flashing the original rom will change the os and radio only, not the spl tho. i also have searched the entire trinity forum but no info available for P3600i. any ideas???

as mention before, I have 2 P3600i.

I try to dump ROM from one to another for restoring factory setting.
Therefore, I following below steps.
http://wiki.xda-developers.com/index...wtoReconstruct

I success dump ROM from non-modified P3600i
(I got those raw files, including ext_fla one)
but fail to convert the dumped ROM to flashable
()

is there anyone know a way to direct clone everything from one P3600i to another P3600i ?