Arrow

Hi Guys,
First of all, Im new to the group guys.Thanks for having me.
I have a 2001 mdx and i just bought a 2000 TL
on the mdx i have ver2.03 on the TL i have ver 1.09j.
What i did was i took the 2.03 cd and D/loaded that version into my2000 TL.No problem there. Now Check this out.I put that cd back into my MDX. When i put my 1.09j ver. back into my 2000 TL i decided to see what version i had in there.The Nav system info stayed at 2.03. Now my question to some of you will be obvious.
Is my 2000 TL Nav now using the 2.03 ver software that i downloaded into it even though i have the 1.09 cd in it??
HMMM,,Very interesting wouldn't you say??
looking forward to hearing from you guyss.
Thanks,
Arrow