Her er forklaring på engelsk, vend tilbage hvis problemer.
If you have horizontal lines, like me at the fisrt time you launch heroes 4
You must check if your windows accept 800*600
Than go to registry table and add Resolution with a dword valor of 00000320
[HKEY_CURRENT_USER\SOFTWARE\New World Computing\Heroes of Might and Magic IV]
"resolution"=dword:00000320
At final you'll have
resolution 0x00000320 (800)
Now you can play heroes 4
VH Palle Hansen