Have you had your CS or 360 ECU's reflashed for COLD START issues???

For those of you who have had their ECU's reflashed, I have a few questions:

1) Do you have the factory cats and/or exhaust?
2) Did the dealer do any readings on the current ECU's before sending them to FNA?

I have a CS that has the cold start issue, and I have Tubi Straight Pipes (no cats) with a Tubi NGT exhaust. My dealer (Shelton) told me that the only way they can send the ECUs back to FNA to be reflashed is if my cats are on the car so they can read the parameters to send with the ECUs back to FNA.

This seems like BS, since two things are true....1) Even people with cats have the issue and, 2) this is a COLD start issue, so even with cats, there's nothing to measure since cats are useless until heated up. SO, I am curious what the procedure was for your reflash..........thanks!!!