Just wanted to say I found my old minish cap samples with all the instruments and stuff, although I'm tempted to do a completely clean rip of them again. At this stage, I'm going to use SynthMaker (albeit at this stage within FL Studio, which means I can only export as an FL Studio plugin) to create a plugin containing all the instruments where possible. This will help standardise the way the music is written, as anyone else will use the same sound set. However I won't limit the use of any other instruments/sounds, but it will probably be generally encouraged that they fit with the quality/style of the minish cap instruments.
The format of the plugin will basically be a preset/sound bank, containing the instruments as a dropdown list.
At some I may purchase SynthMaker to export the plugin as a VST (for use in pretty much any music software, not just limiting it to FL Studio) but I'll see what happens.