Thanks Shawn,
Ive taken a look at your mods-great job!
Update on where im at, the first option i couldnt get to work !so looked at the apple tv route , i thought id got there but just as i was breaking the champagne out i learned that because of using a local router to connect the apple tv , wifi internet connection was lost and the maps app wouldnt work to give directions which was the main reason i was putting the apple tv in.
For anyone interested in using the apple tv the main problem is the power source which you can get round with a power inverter, heres. A link for a uk model(im from the uk..) http://www.ebay.com/itm/231116979201?_trksid=p2055120.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
This might work for usa http://www.ebay.com/itm/390822697458?_trksid=p2055120.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Heres a good you tube link showing most of what you need
www.youtube.com/watch?v=m6oyVyjVZJw
So back to the drawing board , however there may be something ive found like the slu which is from denison products which is here:-
http://www.dension.com/search-sku?startlng=&make=Lexus&type=SC%20430&year=2001-2006&hu=All&img=generic.png&info=-&sku1=GWL3TO1&sku2=GBL3TO1&sku3=GW33TO1
Shawn, is this the same as the slu2 that you mentioned at the end of your post?
Ill keep updating this as i dig deeper , it may be i have to forget replacing the factory sat nav directions with a better system,
One thing im interested in for handsfree where has anyone located the microphone on the sc430?
Thansk again Shawn :)