Lane,
The easiest way is to create a folder in the primary file directory and save all of the files (LNNUpdate.exe, CeLxV.dll, the VINB and VSEV files) in that directory.

Starting with the COM port that you are using to communicate with the V7 is the right approach (and this is where I got off track as my PNA did not show that COM port as an option in the LXNav Update tool)

Good luck! B.