It sounds a little difficult to me. Is it worth going through all that?
It is scary, but if you are careful I think you will be fine. I'm going to try Derek's suggestion when I install my new lanyard on my JCW FOB. When I installed the JCW surround on it I thought I cracked the plastic! But, it seems ok....kind of a poor design imo....the plastic tapers down to a very slim edge at the opening. I would have left a little more meat on the bone if I designed this thing!
Get a plastic trim tool that is slightly tapered, or use a screw driver with a thin cloth wrapped on the tip, and push in slowly/lift up.
My MINI advisor just plopped in something and popped it open like there was nothing to it, but I wonder how many Key FOB's he's cracked over time? LOL!
My new lanyard awaits the install, because I'm scared like you are!

But, hang tough and give it a whirl.
Good Luck,
John