ya ur stuck with it, but i read that u can connect ur psp to ur tv, thats y the psp works as or comes with or can buy a dvd compatible remote(i read it somewhere). But i WOULD buy a movie specifically for watching it on the road or someplace...but thats me.
2nd, cartoons on a cartridge are for kids tho, u only get 1 or 2 episodes....once u watch it...for like, 1 hr or 30 mins, there is only a certain amount of time before u get bored of it.
this has nothing to do with what u said but umds are sorta discs, but they dont scratch easily, they have a hard cover on them i think...with a square that exposes the actual disc. my friend owns a sony mini disk player that looks like a umd, but a square shape, looks like a floppy disc with a mini cd inside.