John&Terry, I wanted to thank you for this post. It gave me the confidence to buy the emulator and Micropod 2 from OBDII365.com to get my XF to "relearn" my new sensors. As discussed, there are varied and confusing instructions. However, I followed this guy's instructions and it worked perfectly: How to install DRBIII Emulator for Micropod 2 on Windows 7 Pro 32-bit | OBDII365.com Official Blog.
In fact, I did not need to buy the "TPMS tool" to trigger the sensors. I went back to Discount Tire, who installed the new Dill sensors and they were happy to do it for me while ran the DRB III emulator to trigger the learning sequence. I happily drove home with no TPMS light - first time since I bought it from the original owner earlier this year!

Art