Halo's PC Upgrades Explored

Thanks to GameSpot for posting a new hands-on preview of Halo:Combat Evolved for the PC. This long-awaited title is making a "conservative" but professional transition from Xbox to Windows, courtesy Gearbox Software, and the enhancements are sparse but notable: "..the [in-game] resolution can be turned all the way up to 1600x1200, and the game's textures look much sharper and more defined than they ever did on the Xbox.. zooming in close to a grunt, we noted specular-mapping and bump-mapping effects on the grunt's gold-colored armor." Also discussed in more detail are the six brand-new PC multiplayer maps, plus mention of "..editing tools that will let creative players create new maps and significantly modify the game" - is there enough time for player-constructed maps to make it into Halo 2?