What you do is you just click on one of these and your status is saved! then if you want to reload your game, go to "Load File" and click the one you registered it on! you can save absolutely ANYWHERE with this system including in the middle of a battle or in the middle of a cutscene!
Ah, yes, that happens to all firered roms i'm afraid, and it's a hack of firered isn't it? i've never been able to fix this, however, get Visual Boy Advance for your emulator and use the save files to save it, if you want i'll give you some screenshots.