Add it yourself...
Change The Stock Stereo Messagehttp://www.club-tc.com/forums/audio-video-multimedia/81-change-stock-stereo-message.html
How To: Change Stereo Welcome Messagehttp://www.yoursciontc.com/information/howto_2005stereo_welcome.html
Aftermarket Stereo Installationhttp://www.club-tc.com/forums/audio-video-multimedia/276-aftermarket-stereo-installation.html
How to change the stereo welcome message onhttp://www.yoursciontc.com/information/howto_2006stereo_welcome.html
How To Install Front Speakershttp://www.yoursciontc.com/information/howto_front_speakers.html
S2000/Element Antenna Changehttp://www.club-tc.com/forums/exterior/227-s2000-element-antenna-change.html
AMP INSTALL IMPORTANT REMINDERShttp://forums.scionzone.com/smf/index.php?topic=1921
Install OEM '06+ Radio Controls in an '05http://forums.scionzone.com/smf/index.php?topic=2083
CUSTOM SUB BOX WITH FIBERGLASShttp://forums.scionzone.com/smf/index.php?topic=2053
Custom sub boxhttp://forums.scionzone.com/smf/index.php?topic=3657
Soldering 101http://www.4runners.org/writeups/solder101/index.html
Get sound from PC to Car Stereo / Amphttp://www.mp3car.com/vbulletin/faq-emporium/32430-how-get-sound-pc-car-stereo-amp.html
Learn How To Install A Car Radiohttp://www.popularmechanics.com/technology/upgrade/3380301.html
Series: Car Stereo Installation - how should I wire my amplifierhttp://www.clubknowledge.com/page5.html
Tire Pressure warning systemhttp://forums.scionzone.com/smf/index.php?topic=2297
American Wire Gauge table and AWG Electrical Current Load Limitshttp://www.powerstream.com/Wire_Size.htm
Electronics Tips: Soldering Techniqueshttp://www.elexp.com/t_solder.htm
Technical Service Bulletin and Recall Informationhttp://www.alldatadiy.com/recalls/index.html
Abbreviationshttp://www.gtfours.co.uk/what/abbrev/abbrev.htm