It's a multi-boot disk, so you can play it from a virtual drive.
Use Alcohol 120% or Daemon Tools – CD-ROM emulators.
HERE IS THE LINK TO THE SOURCE
Source page: All Heroes of Might and Magic
Download as a single file: http://depositfiles.com/ru/files/spqnfbehz
part1 [100 MB] http://depositfiles.com/files/6d30m6daf
part2 [100 MB] http://depositfiles.com/files/isiio326h
part3 [100 MB] http://depositfiles.com/files/1ua0exdck
part4 [2.10 MB] http://depositfiles.com/files/z8h9im0aa