Base idle RPM is universal setting. All Map will be the same idle RPM.
The good thing is you only have 3 Maps to worry about.
I would definitely check it with the Uprev pro tuner closer to you to check how these Maps were tuned. Car should be not a problem to drive, just do not red line it . I would not trust the tune 99% as of now since we do not have any idea how they tuned it or what parameters changed. Normal driving should be fine at all on those 3 Maps. Avoid WOT(flooring the pedal) we are not sure yet if AIr/fuel ratio is dialed in on WOT run.
BTW, buy a lottery since how often you get free Uprev license? =)
You can also buy an Uprev cable and flash the car back to stock, your Uprev license will pair to your cable. I can ask my tuner to give you a back to stock file. Regardless of tune file being locked by your tuner, I believe flashing back to stock will overide everything. When you are ready to see a Pro Uprev Tuner, just bring your cable (w/ Uprev license paired) and he can take a look at your MAPs or create one (pay for dyno hours)
Or
Buy a cable, flash it back to stock and Use Seymore4 to Etune your car. You have to email him your data log.
Right now we do not know your ECu serial number. You have to call Infiniti parts dept. to get that. They will ask for your Cars VIN#
Write down your ECU serial number since tuner needs that to get you s base ROM and back to stock map.