Upgrade from 10.2.0.1 32bit to 10.2.0.4 64bit windows

This scenario i have planned to make an attempt of my own..
1) Plan to Migrate existing database from ( 10.2.0.1 ) 32bit to (10.2.0.4) 64bit database
2)Existing DB is No archive mode,
3)OS windows server 2003 Enterprise sp 2(32 bit)
Migrate DB config
1)Os windows server 2008 Enterprise 64 bit
I need help from oracle gurus!!! how to migrate existing DB Upgrade from 10.2.0.1 32bit to 10.2.0.4 64bit windows
1)how to take backup?
2)how to upgrade oracle version?
3)proper step to follow completed this task successful
For database migration and upgrade activity...
share your suggestions please
Regards,
Venk@t

How big is the database ? How much downtime can you afford ? One option is to install 10.2.0.1 on the target, apply the 10.2.0.4 patch, create an empty instance on target, then export the database from the source and import into target.
Pl be aware that 10.2.0.1 thru 10.2.0.4 are on sustaining support and 10.2.0.5 is on extended support (if you have paid the extended support fees). Why not upgrade to 11gR2 ?
HTH
Srini

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