Setting the crank and cam timing requires special tools to line everything up. Did you use these? Are you getting any codes?
This requires some testing to see what the issue is. I'm not sure why you replaced the cat, but hopefully it wasn't for this issue. I would start with checking fuel pressure. These models have issues with the fuel system, so start there. Or better yet, have a professional look at this so you don't waste your money replacing parts that are not needed. Do you need help finding someone qualified to take car of this for you?
If you're going to do your own maintenance, I suggest you subscribe to one of the online repair manuals here: http://bit.ly/mitchell_repair_manuals_online And search Youtube for a few video's that show the proper way to replace a spark plug. In other words, be informed before attempting this job, these cars are not as simple as they were in the past and you can get yourself into trouble if you don't have an idea of what you need to do. Good luck.
Trying to remember, I believe it's 1-3-4-2
By clock you mean the clock display on the radio?
Your car has several computers that control all the electronics, and they all communicate with one-another on a network called the CAN, or Controlled Area Network. You should have someone that is familiar with Volvo's look at this for you, it can be one of the modules, the network itself, or even a software issue. This requires special equipment, information and knowledge to diagnose these issues, I suggest a Volvo Dealership, or Independent shops that specializes in Volvo's or European cars. There should be plenty of these around you, assuming you live in the 90210. Good Luck
They have had a lot of problems with the door latch assembly on this model, it will likely need to be replaced.
Either your scanner is not compatible with the ECU or the ECU has a wiring, or internal issue. My bet is it's not compatible. This year the Volvo has a mix of old and new technology and the ECU is the "newer" of the two. Try contacting a euro shop and ask waht they use. Good luck.
There is an issue with the emissions system that turned the light on. You will need to have someone diagnose the emission system to see what caused the fault to occur, then turn off the light. For these situations it's best to have an shops that specializes in Volvo's and/or emissions test/repair look at this for you. Good luck
If the timing belt broke, you're looking at an expensive repair. When the timing belt breaks, the internal engine parts will contact each other and need to be replaced. In more clear terms, the piston hit's the valves, bending the valves and in rare cases, the piston can be damaged. The cylinder head will need to be removed and inspected, then fixed. This can run $3-$4000, so it's probably not worth fixing IMHO. Bret