im sure the brahms ballade would not be much of a problem technically if you can do the poulenc, unless you arent that great with chords. if not, make up some chordal exercises with some of the passages from the brahms. perhaps the past experience with teh intermezzo will help a little bit.
btw, it says in your profile thats youre from LA. is that los angeles, or louisiana? im from los angeles.