how to upgrade my pda OS

[puq_sap]

i am a chinese.
i want to upgrade my pda OS for english version.
my pda is dopod 828 chinese vison (Europe Version is "O2 XDA IIs"):
model:PM108
CPU:Intel(R) PXA272 416MHz
RAM:128MB
ROM:64MB
i want to upgrade my pda OS for english version. Somebody can help me?Somebody can tell me how to upgrade OS? And somebody can give me the files for upgrade?My Email is puq.sap@gmail.com
Plesae!