Is200 Sat Nav With Aftermarket Stereo & Updating Maps

[timmurray]

Hi guys, I bought an IS200 sport on monday and its got the built in sat nav but because the car came with an aftermarket stereo i am unable to use it.....i appreciate that this topic has been covered to death on this & other forums but after hours of searhing i am unable to find a solution. all of the off the shelf components seem to no longer be stocked online from what i can see and the schematic for the bypass cable is useless to me as i am utterly clueless when it comes to wiring. Someone suggested that i buy a second hand OEM head unit but i dont see the point as i want to install a 7" double din screen/DVD unit with reversing camera in the very near future....does anyone know if someone still makes what i need to get the sat nav fully functional?

Also, while i'm on the subject of the sat nav i've found a website that sells up to date disks for £35 (http://www.satnavi.com/lexus.php) anyone know if these are any good?

if anyone can help me on this you'd be doing me a massive favour!

[timmurray]

Anyone???

[timmurray]

I've managed to make the resistor/diode bypass but can anyone tell me where I need to connect it? Does it go in the amp or one of the two white plugs that are no longer being used behind the centre console?