You may already know this, but you can switch the music to original-style FM synth under the options menu (5th page, BGM Style -> Old). You can also switch to saving on the SD card by saving to slots 2+, which is way faster than saving to cartridge.Negatives: the remixed music is awful and it still takes forever to save.
ed: also. Holy crap. 5 pages of options in a handheld title. I've played plenty of PC games that were less customizable.