Reading list in picoplayer ?

Hello word,

First question: how to make my onw reading list without picoreplayer (with a PC for example, wy MP3 are on a NAS file server) ?

Second question : Do you know how to make a reading list with only MP3 witch have this tag ? (My best MP3 are tagged with a "1" or "2" character in the commentary tag=

Thanks you all for your help or advice