MS-DOS is no longer officially supported under Virtual PC 2007, as such the DOS Virtual Machine Additions are not included with Virtual PC 2007. However – if, like me, you want to run DOS on Virtual PC 2007 – you can get the DOS Additions by following this easy process:
- Download Virtual PC 2004 SP1: http://www.microsoft.com/downloads/details.aspx?familyid=6d58729d-dfa8-40bf-afaf-20bcb7f01cd1&displaylang=en
- Extract the contents of the installer per this blog post: http://blogs.msdn.com/virtual_pc_guy/archive/2007/01/08/extracting-files-from-the-virtual-pc-installer.aspx
- Grab the DOS Additions .VFD file and insert it into the floppy drive of your virtual machine under Virtual PC 2007.
- Run the install program from the floppy under the virtual machine.
As I have already mentioned – this is not supported – but should work fine.