glozza,
My old XP computer with the 6200 died and I bought a new one. I did manage to revive the old one somewhat, and I was going to try and install BM3 on it to see if it would work, but the DVD drive no longer works properly and I couldn't get it installed.
The original BM2 that I played on the 6200 belonged to a houseguest who has since moved on, so when I bought BM3, I bought the collection which contains BM2 and BM3. The manuals for both games are on the DVD in PDF format, and both manuals list the same requirements for video cards. That's about all I can offer since I couldn't get BM3 installed on the old computer.
I just started playing BM2 again on the new computer, because I never got to the end on the old computer before it died. I have not installed BM3 yet. I just finished Lost Horizon and Gray Matter, both excellent games, and an older game that I never got around to, Treasure Island, which was also pretty good. I had started Baron Wittard, but I had to take a break from it for a while, some really hard puzzles, and I decided to work on the BM games instead.