Yes it says BOOTMGR mising because you half installed vista, boot from the windows 7 CD, format the partition the half installed VIsta is on, and then install windows 7 clean from that CD.
Then follow the guide I linked and you will be able to activate it (I know the box is for upgrades but it will work the way guide says).[/quotem
i cant boot from windows 7 it emedaly goes to that bootmgr is missing an i deleted unalloactod sapeces an partions.