Help with swapping kext

[huggie]

Hi,

 

There seems to be many kext files in /System/Library/Extensions/. How do I know which ones are currently loaded?

 

If I want to swap one kext for another, how would I go about doing so?

 

I intend to change driver on display support, I don't get the whole kext thing other than it's sort of like a kernel module?! I'm comfortable with command lines. Any pointer would be appreciated, thanks.

 

huggie