Too busy nowadays, I can’t visit this forum as frequent as before, and so please forgive me for my late replies.
Hey Symphonicdance, how did you go with your FRSM?
I passed my FTCL last year and have decided to keep the momentum going by doing FRSM with the following programme:
Bach-Busoni Chaconne in D minor
Rachmaninoff Etudes op 33 (complete)
Scriabin Sonata no 9 (Black Mass)
It's not really a specialist programme (unless you count the two Russian composers from the 20th century) but one I thought would keep me interested for the 11 or so months or preparation and also one that is hopefully enjoyable and interesting for the examiners!
As far as reference material goes, I know that Andras Schiff has don a bunch of talks on the Beethoven sonatas, which you can find on youtube, he's also put out a DVD with some Bach workshops. The best analysis of the Beethoven Sonatas (for the Viva Voce) I've come across is by Sir Donald Tovey, I used to have them all but they've been missplaced (or maybe lent out) at some stage. It would probably be a good idea to go through the works and do your own analysis so you can feel like you have a thorough understanding of the pieces
Hope that's a help.
Also, why no teacher? If you find a supportive one it can be a huge help 
I am planning to go for a “specialized” program of Bach’s original & transcribed works. However, I am struggling on the exact topic, the direction of research for the submission paper. Regarding reference materials (books & CDs), I am fortunate enough to be able to find some at public and university libraries. Of the three works to be played, I am basically left with Chaconne which I am just 60-70% done. Busy lately, and hence, insufficient time to practice as much as I supposedly needed. Fortunately, no pressure for me to K.O. the FRSM diploma ASAP.
Your FRSM programme appears to be fairly challenging, both musically and technically. Good luck! Just curious, I wonder how fast you will play the Russian works. If my memory serves me correctly, only Chaconne is on the syllabus, and according to exam guidelines and regulations, “on syllabus work(s)” must account for at least 1/3 of the total playing time, or put in the other way to interpret, “own choice(s)” must not account for more than 2/3 of the total playing time.
Hi! I was just wondering, how do you prepare these diploma exams without any help of teachers? Could you share some tips? 
1) Luck, luck and luck!
2) Know his/her own strengths and weaknesses, and carefully select the appropriate works from the syllabus.
3) Enough time to practice.
4) Sufficient in-depth research (e.g. as mentioned by danpiano37, “A Companion to Beethoven’s Pianoforte Sonatas” by Donald Francis Tovey is marvelous for someone who will pick a Beethoven sonata for the exam).
5a) Attend master classes, even as an audience (some universities and organizations offer free master classes for public, and the coaches are first class pianists / professors).
5b) Watch online master classes / DVDs.
6) Listen to MP3 / CD / smart/i-phone of the exam works whenever possible (e.g. taking public transportation).