Well,I tried that and boot came out but left part of the inside on plug.looks like I'm up sheets creek.I don't have them personally but I heavily considered them and spoke to PR about them a lot. My understanding is you lift up the "skirt" to help break suction, and then pull from the base (aka the part under the skirt, at the top of your plug cylinder)
i did put grease prior to installTime for a new set of PR wires. ($70)
The new ones are an upgrade over the old ones. Make sure to put dielectric grease (a.k.a., silicone grease) between the rubber boot and ceramic insulator of the plug.
I bought the same grease, and it caked up and got a little stuck. I used wd40 and it came out.i did put grease prior to install