Is there a way to connect an ipod via USB to an 05 LS430 nav system, in such a way as to allow full browsing capability (i.e. audiobook, podcast, album, artist, etc)? If not, is it possible to fit a fifth generation Lexus nav unit into this car?

I have done a lot of searching on this forum and on the web, and I have not been able to find an ipod integration method that allows full ipod browsing capabilities. And from what I've seen, it seems like this limitation is due to the MD emulation on the Gen 4 navigation.

TIA.