Yes you can reprogramme your fob.
Place the test cable into socket 1.
Turn the ignition on to Key Position 2.
Enter Diagnostic Test Mode 5 by pressing the button five times for about half a second each time.
The LED will flash and stay lit up, waiting for you to enter the code: 3-3-4
Press the button 3 times, then it will stay lit
Press the button 3 times again, it will stay lit,
Press the button 4 times and finally hitting the lock/unlock buttons,
It will flash back 1-1-x, x being the number of key fobs programmed (up to 4 at one time).
It can be tricky but keep trying. Youll need to turn off your ignition to test the fob after this.
When you get into the swing of entering these codes the diagnostic tool will talk back!
heres the link I used to help me, but the hardest part is getting into the rythem of typing in the codes inorder to get a respone etc.
http://www.am.torun.pl/%7Eja/volvo/a...obilizer.shtml