I used this for a bit years ago (right when first gen Ipods came out ) in my car. I had a old P 1 233mhz with 8 megs ram (round abouts just trying to show it does not use much system resources)
It will fit your bill in terms of selecting 1-255 and if you had a display would let them see track and such. it will auto resume if turned off.
As to the playing on and not cont.. it might be possable but i never needed such functions.
I was able to operate this in the car with a simple numeric keypad and did not need a monitor at all.
I'm looking for an MP3 player (either CD-based, or flash if its capacity is 1GB or higher). For our purposes it will have 225 songs in it, but their names are simply the numbers 001 through 225. Lots of people with very little technological mojo are going to be using it, so I'm trying to keep it as simple as possible for them by just letting them enter the song number they want and then hit 'play'. (Like with a number pad or something. It would also be an added bonus if it could optionally be set up to stop after playing one song, rather than continue on to the next, but that's not absolutely necessary.) Portability is not an issue, as it will be staying in one place. I'd appreciate any suggestions and thanks in advance!