Question about installing projector fog lights

[Terra]

Hey everyone,

I'm in Canada with a 2008 RS Hatchback. I have foglights factory installed already, but bought the typical eBay projector foglight set because they look awesome.

From here:
Ebay site

I have limited experience with installing stuff like this. I'm comfortable taking the dash apart because I installed a bluetooth kit, but haven't ever dealt with the bumper.

I found a couple how-to's on this site, but the first has broken images, and the other is for installing foglights on a Yaris that didn't have any previously installed (below)

So I guess I'm just wondering what I'll need to do. I was looking at this page but I don't know what modifications I need to apply to this procedure.

To summarize:

Will I still have to modify the switch harness or anything weird like that? What factory stuff can I leave in?
The lights I bought from eBay have Halos, can I make those come on with the daytime running lights?

Thanks so much everyone. If I get them in soon I'll post pics. :) I'm so excited!