Man, it sounds like Doom 3 needs a Sun render farm to be able to run well.
Unfortunately, I'm also one of those folks who's uses a laptop as well:
Intel (Mobile) Pentium 4 ~2ghz
NVidia GeForce4 420 Go w/ approx. 32mb RAM
512 MB RAM
Windows XP Pro
This is the reason why I don't do too much PC gaming.
![Wink ;)](./images/smilies/icon_e_wink.gif)
I'll play Quake with the DarkPlaces mod, Baldur's Gate 2, and Conquer Online, and that's about it - I'm too scared that my computer will implode if I play anything more graphically intensive - that's what my ExBochs is for.
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
I'd love to try out HalfLife, but I just don't think it will run all that well...