QUOTE(susiejean @ Jan 21 2008, 11:45 AM)

Im glad you've said that. I'm seriously considering trying that one now, as between teaching and looking after a youngster, I'm not sure I can pull all 3 pieces up to a passable standard before the scales syllabus changes. I haven't even looked at the aural yet, and I'm finding the scales a 6th apart troublesome.
I wondered if I should try and sell the Shostakovich book on Ebay, although I won't get back anything like what I paid for it. It actually reminds me of Last Post every time I start playing it.
I tried doing a search on Youtube for the Bach Duetto but to no avail. The other 2 pieces are gradually coming together, so this is beginning to seriously stress me out.
Perhaps you are just expecting things to come together too quickly, and panicking because you have set yourself a deadline that might be unrealistic, as you can't practice as much as you would like/need to because of other demands on your time. But it seems a bit premature to give up on the Shostakovich so soon. Especially after all the soul-searching that went into choosing it, and bearing in mind your lack of enthusiasm for Bach.
You can keep looking for "easier" pieces, but that is not really going to help. Firstly the pieces are chosen to each pose a similar degree of challenge. Secondly the examiners are no fools and they expect any significantly easier pieces to be played to a higher standard, so the amount of work needed is going to end up much the same.
As for the big stretches in the Shostakovich, I am sure that the syllabus states somewhere that if you can't stretch an interval because your hands are too small you can arpeggiate it (or judiciously omit notes - provided the musical effect is satisfactory) and that there will be no penalty for doing so.
Ultimately there are only two things you can change. The quality of your practice, and the amount that you do. (Actually there is a third - by becoming a better overall musician the ability to grasp a piece both as a whole and in its details improves, and so the technical problems seem less).
[Warning. Preachy stuff ahead. If the following section is "teaching you to suck eggs"then please feel free to publicly berate me - but sometimes teachers don't follow the advice that they give to their students]
As you can't spend more time, then you have to use the time you do have very effectively. That means focussing your efforts on overcoming the difficulties you are having. To start with that means no playing through of entire pieces for pleasure, or of long sections, except very occasionally, and with some specific purpose such as to check progress with technical problems, or tempo, or fluency. And certainly you cannot afford to practice inefficiently by always taking a piece "from the top" and then tagging on a few more bars each time until you can get through the whole thing. A routine "warm-up" of scales or exercises that you can already play well can also be viewed as a waste of time.
Instead you have to be very organized and disciplined to isolate the sections in your pieces that are giving you problems, work out WHY you are finding them difficult, and figure out HOW you are going to overcome the problems. You then try out your possible solutions, and when you have one that looks as if it is going to work, you repeat each of the difficult parts in an isolated short section (short enough to play without error) as many times as it takes to make it both fluent and secure. Then you integrate it back into the preceding and following sections. Focussed, concentrated work of this kind can seem tediously slow, but actually it is the quickest way to make real progress. It will drive your family up the wall (!), it is mentally tiring, and it may still take weeks or months to master really difficult (or new) physical actions. Unfortunately you cannot force these things, and if you do, you just have to go back and do them properly later - like painting a topcoat without properly preparing the surface. They take as long as they take, and there is no point fretting about it!!
[ End of preachy stuff]
I would not worry about possible changes to the scales syllabus. If you can play the scales currently in the syllabus you will easily learn the couple of new scales that will be required if it changes. As for scales in 6ths, the method described above works wonders. Find the tricky bits, isolate them, fix them, put them back in context.
Whatever your decision, I wish you every success and, more importantly, an enjoyable journey on the way there!