Dual boot XP - Vista on two different VHD

[Zippolo]

i have the necessity of install 2 os ntfs, one XP and one Vista in 2 different virtual disks, how can i do the dualboot from 2 different virtual disks?
I must configuring vhd XP on vhd Vista, for this i used the command bcdedit and i did these configurations:

########################################################
C:\Users\Administrator>bcdedit /enum

Windows Boot Manager
--------------------
identifier {bootmgr}
device partition=C:
description Windows Boot Manager
locale en-US
inherit {globalsettings}
default {current}
displayorder {current}
{c978ca04-4059-11e1-b4dc-0800272710c5}
{ntldr}
toolsdisplayorder {memdiag}
timeout 30
resume No

Windows Boot Loader
-------------------
identifier {current}
device partition=C:
path \Windows\system32\winload.exe
description Microsoft Windows Server 2008
locale en-US
inherit {bootloadersettings}
osdevice partition=C:
systemroot \Windows
resumeobject {6f266201-3e61-11e1-a62d-d7acbeaeb333}
nx OptOut

Windows Boot Loader
-------------------
identifier {c978ca04-4059-11e1-b4dc-0800272710c5}
device partition=E:
path \ntldr
description Windows_XP
locale en-US
inherit {bootloadersettings}
osdevice partition=E:
systemroot \Windows
resumeobject {c978ca04-4059-11e1-b4dc-0800272710c5}
nx OptOut
detecthal Yes
########################################################

when i try to reboot the virtual machine from Vista, i get two choices, one Vista and one XP, if i click on XP it stops on bar loading.

I don't understand because it not goes, someone can tell me something more in purpose?

Thanks a lot

By Symon

[mpack]

You set up multiple Virtual PCs, one for each operating system you wish to play with. If you want to run XP you run the XP VM. If you want to run Vista you run the Vista VM. So-called "dual boot" has nothing to do with this.

[Zippolo]

Hi,
thanks for answer, but i must do a dual boot with the two vhd, this is possible?

Thanks in advanced for any answer.

By symon

[mpack]

If it's possible to dual boot two versions of Windows using two hard drives in a physical PC, then it will be possible in a virtual PC. However I've never needed to find out how the former would be done.

[Sasquatch]

You would set the VM to the XP profile, so XP can work properly. Then you install XP first, as you would on bare metal. Then you install Vista on the second VDI to create a dual boot. If you did not set the profile to XP, then Windows XP will fail to boot due to missing drivers for the storage controller (default profile for XP is IDE, Vista has SATA as default HDD controller).

If the two OSes were installed separately, then the MBR of both disks, along with the Vista bootloader, will give problems and boot failure.

I really don't get it why you want to create a dual boot VM. You can just as easy create two separate VMs as mpack pointed out.