My original flip key fob was cracked. I tried a few different ways to get the transponder out. I ended up just sanding it out.
If you buy the 29 dollar one it comes with a transponder. With out modifying your key I dont see away to make it work on the flip fob. I have seen a video on YouTube where a guy modified his key to work with the flip key fob. I'll try to find it. I didnt watch the whole video so I do not know how successful he was.