Help with NAV install

[gatorsdogg]

I have a 05H2 with a 6disc in-dash unit. I bought a Nav unit and installed it.

It was working but didnt sound as good as the 6disc. After i turned off the key it went into "theftlock activated" mode. I went to the dealer and made an appointment to have it unlocked for this Fri. While I was there they looked in my glove box and saw that i had a y91 code. They said that this was the "Lux" setup. After that, they looked at my head unit and said that it was a "non lux" unit (10377287). Will it work and sound as good as before?

Im confused...what should i do??