Vmk patch

[zaphoxx]

this is a simple crude approach to make the search for the vmk header more generic. In the end it is only 3 bytes that might vary from the total of 12 bytes for the vmk header. so the comparison just skips the 3 bytes in question and compares the remaining 9 bytes only. I know it is not very elegant but it worked in my setup and should in general work fine.