I'll have a look at your AppleIntelE1000 suggestion. I'm still working on perfecting my DSDT code. I'll be posting up me new X61 kext pack in the next couple of days. My new DSDT has the following:

1. Unused elements removed (such as TPM; trust platform module)
2. Perfectly working sleep/wake and hibernation/resume
3. APIC IRQ redone to match the MacBook's
4. Updated UHCI and EHCI sections to fix random sleep/wake issues
5. Fully functioning P-States and C-States (I'm currently running 41-43C as I type this up)
6. Firewire code fixed to prevent errors which caused unnecessary CPU usage and heat
7. All EFI strings have been eliminated and are now included in the DSDT code
8. Eliminated the need for Legacy_AirportAtheros21.kext, as DSDT will assume you have an Atheros card installed.
9. All devices have been renamed to match the MacBook's