Default [Q] Change Firmware from JPD to JS5. Possible?

Is it possible without loosing any functionality to change firmware from the original Korean JPD version to the European JS5?
My phone shows following data:

FROYO.ZSJPD version 2.2
Kernel I9000 ZSJPE
PDA I9000 ZSJPD
Sales code VD2
CSC I9000 ZSJPD

Phone has no Simlock.