+Microsoft Windows XP Professional Service Pack 2 (Build 2600)+
+Hewlett-Packard HP Compaq dc5100 MT+
Okay. When I search for that at HP, I get two different models, so I'll give you the XP Pro download pages for both of them (there's a picture of each on the downloads page):
HP Compaq dc5100 Microtower PC (XP Pro)
HP Compaq dc5100 Small Form Factor PC (XP Pro)
... So head to the page with a picture of your particular model on it when you want to check for updates to your componentry.
There isn't an update listed for your LITE-ON CD-RW SOHR-4839S in the "Firmware" section of either downloads page, which suggests that you're up to date on the firmware for that.
+I've tried cd/r and cd/rw. The cd/r will play other places but not my car. In reading other posts, sometimes the same problem had to do with the burner firmware.+
Hmmmm. Have you tried reducing the burning speed when you try to make that CD? The controls for that are in your iTunes preferences.
Go "Edit > Preferences", click the "advanced" tab, click the "burning" subtab to see the burning speed options.
(Another thing that might be worth experimenting with is seeing if the Tundra accepts the CD if you try burning it on another brand of media.)
