Hi,
I think this post is more suited to a MAME forum.
If you read the hiscore.dat file it says the below.
You can also read this post.
http://forum.arcadecontrols.com/index.php?topic=51625.0I haven't tried it, so sorry I can't give you any more tips.
;This file can be edited with a text editor, but keep the same format:
; all fields are separated by a colon (
; <gamename>:
; <cpu>:<address>:<length>:<value to wait for
; in the first byte/word>:<value to wait for in the last byte/word>
; [repeat the above as many times as necessary]