Amitprsingh

How to install latest update ddjp6 to i5801?
friend i am new user of android, recently i update my i5801 cell with froyo ddjp2 by kies. but now i had some problems with kies. when i want to update firmware by kies it says " FIRMWAREUPDATE HAS STOPPED WORKING". so plz tell how can i install manually ddjp6.
Plz provide me full details. THX.
urgent

when i try factory reset my mobile shows error n force close wat should i do? plz plz reply me.....