Where are you going? It sounds like you're off to USA/SA/etc. for a 3-week special, so...
It is undoubtedly possible to pass the whole set of exams in a couple of days by learning the questions from the Confuser - however, you will understand
very little of it unless you study seriously. You can't do that in the evenings while trying to fly three or four hours a day - you have to do it before you go. The obvious thing would be to do the exams while you're studying them - I have no idea why you would decide to study but not take the exam....
If I have misunderstood and you're doing it 'normally' in the UK (i.e. flying twice a week or less) then I wouldn't bother doing them first. Unless you really slack off the exams then they'll be done before you get to the end of the flying.
You need to do these exams for a reason. Form 215 and a page of METARs - should you take off or not? Are your weight and balance OK in a PA-28-140 with 3 mates in? Can you get into that farm strip? Can you get out again? Just what is Rule 5 anyway? Why are you doing those Mag checks before take off? The list goes on and on, so take them seriously and get them done first....
