If you are doing this job on your own, without an extra pair of hands or garage lift I'd allow at least a couple of hours to do this.
My best advice is to take the driveshaft off the car alltogether and hold it in a vice so you can tap off the outer CV joint, remove old boot/install new boot, and get the joint back on and the new boot fastened up.
For the sake of 6 bolts at the gearbox drive flange, it really is worth taking the driveshaft away from the car alltogether.
ALso - you can remove the balljoint by unscrewing the nut. If the joint wants to turn there is a torx insert in the thread so you can hold that against the nut while you unscrew it. A fimr tap around the housing with downward pressure on the arm should be enought to free the BJ - no need to risk damaging the boots with a pickle forl or splitter and this way you wont upset the alignment.
One other point - when reinstalling the inner joint to the drive flange - make sure the threads of the bolts are very clean of crud (you dropped them on the garage floor when remobed them, didn't you) so spray a paper cloth in WD40 and give them a good wipe and oil. Install one partialy, then the one opposite and so on, then progressively work them in a bit at a time. This will help avoid cross threading.