How to upgrade win2000 Domain controller to 2003 Domain

Answer:
First upgrade ADC Version.
In 2000server machine ,
1. Insert 2003 cd into Drive then take cmd promt.
2. I386>adprep /forestprep -------------------------runs forest upgradation.
3.I386>adprep /domainprep -------------------------runs Domain upgradation.
4.Then you can safely upgrade 2003 Server.