Newbie question about kext files

[SmoothRunnings]

I have a newbie question for kext files and seeing there was no direct forum on this site to post it I thought I would try here, if I am in the wrong place could you move this topic to the correct place.

My question is, when you install kext files do you need to remove the system default loaded ones from the extensions folder so that the new ones properly load?

And is there anything that can determine which ones you need to remove?

Thanks