Wow, what museum did that crawl out from? I myself am quite the antiquity connoisseur. ^_^
My recommendation would be to upgrade the whole computer, preferably wih one from the 21 th century.
But money is a constraint (as I'm sure it probably is, lol), then pick up a GeForce FX card and you're in business.
Incidently, regardless of that k2 diagnostic, the game should still run on your comp....just not very well.