[spooky]

I also use an HP 8100, CDRWin 3.8d and have never had a problem with Army Men Air Attack.

From what you have said then i suspect that its the mod chip, you mentioned that it is an older mod chip, pre 99, well the ###ne require's the same chip but with different code (MMV3 hex "Multi Mode Version 3").

Get a new mod chip installed with that version hex and that should sort it out.