Yes, the kessy comes in a slimmed down version, I believe it's called "keyless go" or something like it.
It is the kessy without keyless entry.
You'll need to:
Remove ignition lock
Install ELV and adapt it to the immobiliser ( can't do this!)
Wire the ELV into the current harness
Install kessy module and adapt it to your VIN
Install antennas in the interior
Get the proper trims for the steering column
Get new kessy enabled keys.
Now it doesn't sound like much but please make sure you know what to do for the immobiliser adaptation.
A new ELV cannot be learned into the system.
When I did my kessy retrofit, I was advised by a very skilled person on this, and he told me to get a used ELV and the used cluster that came with it. They have to be from the exact same car.
This way, the immo data could be transferred.
Then with another tool, I was finally able to learn the keys to the system.
All in all, I repeat, it's not something can do for you. It's a great tool, but not an immo tool.
I would, finally, suggest to think about doing the handles as well. The remote will still work but the unlocking by door handle is sooooo very sweet to have.