I followed the instructions used by vaag's tutorial, however I have a small problem. Once I replace Chameleon with the modified Boot, 10.6.2 will no longer boot. I have no problems booting into 10.5.8, and the tutorial completely fixed my X3100 problems under Leopard. I used a recompiled DSDT.aml (again, following the instructions). I have no issues with 10.5.8. In fact, the DSDT that I compiled works great with 10.6.2 and the default Chameleon (latest version), but once I replace the modded "boot" it will no longer start, it just hangs after loading the mach_kernel. Also, I seem to have no 3D effects under the latest Chameleon build. Does anyone have any ideas? **EDIT** Solved this one myself. Since I started losing track of bootloader/dsdt combinations, I decided to reinstall. After install, and still in 10.5.8, I copied the DSDT.aml that I compiled before onto my Snow Leopard partition. I left the bootloader intact, as installed by SnowOSX. I restarted, booted into SL, and bingo, video with 3D enabled. All fixed. Now I just need to figure out how to apply combo updates to 10.6.4 without video issues... **EDIT** And I applied the 10.6.4 Combo Update without issue. I still have 3D effects and I didn't have to hack anything after the update. Perfect!