One thing I will add to this is that if you have a vhd boot entry already there then EasyBCD will currently modify the entry and remove the lines needed to do that boot. It will be reverted to a standard boot entry. This doesn't matter if the windows 7 installer did it (secondary windows 7 install) or if you added it via bcdedit.
P.S. - I know this thread is a couple of weeks old. -- info above accurate as of public beta build 63.