i see.
take your time. some things can't be rushed ^.^

the "bizarre wall where the airport card slides in" is in fact the rear support for full length PCI or AGP cards. such as a geforce4 Ti (no choice for you, as your 9800pro is faster anyway). i also removed this part on my first MDD mod, but was able to keep it the second time by using a 15mm thin fan in the speakerhole.

seems your MDD isnt really stable at 1080? i have had good results with several dual 867, although running painfully unstable at 167/1080, i had no probs whatsoever at 167/1000 MHz. the only real PITA would be to clock them back to 133/867. these resistors are too damn small for clumsy me roflmao