Some kexts doesnt't work loaded form Extra - eg. most of graphic injectors. Some works only if they are cached in mkext file. Maybe it will help with LAN driver. If not, put it in S/L/E or put kernel flag -f into com.apple.Boot.plits.
Essential, intel/Jmicron legacy, OpenHaltRestart - works form Extra without problems.
By the way, if You're using AppleDecrypt & Disabler, then there is no sense to have dsmos.
If Youre using iPC, and havent modded it to use Extra, then You should check out Your S/L/E. Probably You have second set od essential & Intel/Jmicron kexts there.
Info about VoodooHDA & Extra, You can find on VoodooHDA subforum:
http://forum.voodooprojects.org/index.php/topic,155.0.htmlI don't have idea about You display issue, but I don't thing there is connecion between it and Chameleon 2
Anyway if You expect help I sugest You to write down Your specs. - at least graphics related.