IIRC the check was something even weaker than that. It just counted the number of verbs in the cog script and if it matched you were in. Cheating in online games was a pretty new concept though since online games in general were still a pretty new concept. Games would advertise themselves as being for hacks and people would come in and use all their weird scripts on each other.
It was a weird symbol counting scheme that was easily twarted. It was also completely client side validated so it was very possible to just intercept the checksum and force a match.
