Firstly, I assume you mean outer CV joint boot and not inner.

Did you have the one-piece or the two-piece boot put on? The one piece requires removal of the rotor and hub from the drive shaft as a minimum and if they follow proper Volvo directions, they should actually remove the outer CV joint, degrease, inspect and repack with grease. The two piece does not. The two piece is basically put around the CV joint and a special adhesive/epoxy (?) is used to seal the two pieces together.

In either case, it should not have affected the allignment unless they didn't know what they were doing and damaged the steering or suspension trying to remove and install everything again.

About eyeing your allignment, I don't like that method because it's one of those things you can't rely on your eye for. If it really was that out of allignment that it would be that easy for you to see, your car would REALLY pull, and your front tires would be wearing VERY fast and unevenly. Check the suspect side's tire and see if there is extreme feathering on the tire tread.

Tie rods can do a bunch of stuff to the handling of your car. To check this, jack up the front end SECURELY, and try to cause steering on the front wheels back and forth rapidly. Basically, grab the wheel and the 9' o clock and the 3 o clock positions, and try to cause steering movement back and forth rapidly. If you can feel something like clunking or sort of like the wheel is kinda loose from the steering, you have a failing/failed tie-rod end.

When was the last time you had an allignment done? Was there some ununiformity in the pavement that could have caused this pulling? My recommendation, inspect the tires, and if in doubt, have the allignment checked. At worst, a front end allignment costs less than $50 Canadian. And ask for a before and after print out of your allignment specs. Less than $50 now is better than a new set of tires.