IF YOU WAN ONLY MOVE BOOT SECTION TO OTHER DISC ( in this case on d: )

1, CMD, with ADMIN RIGHTs
2, bcdboot c:\windows /s [ destination ]
destination example : d: ( which is disk which want to use for destination ) 

3, Set to active partition and boot from this disc.
4, Good utility for edit bootmgr is EASYBCD

IF YOU WANT MOVE AND CHANGE BOOT MANAGER SETTING
(exam­ple : you have one par­ti­o­tion for boot man­ag­er and c:\ for win­dows, and you want to move boot man­ag­er to c:\ )

1) COPY Boot and bootmgr from old disk to new disk (c:\)
2) Open a Command Prompt with Administrator privileges
3) bcdedit /export C:\Boot\BCD
   :: C - is destination disk
   cd c:\Boot\

bcdedit /store BCD /enum ALL
:: /store - switch to specify the BCD file in the current directory
:: if you write only [ bcdedit /store BCD ] command print actual setting

bcdedit /store BCD /set {bootmgr} device partition=C:
:: I set bootmgr to look file on C: partition

4) mark C:(destination disk) Active via Disk Management

SOURCE:
http://www.ehow.com
http://www.softpedia.com/EasyBCD
http://superuser.com