I usually look over here for the functions to Scripting.FileSystemObject:
http://www.tutorial-web.com/asp/fso/
just have to know how to interpret that into jscript and you're fine.
code:
var fso = new ActiveXObject("Scripting.FileSystemObject");
fso.OpenTextFile(MsgPlus.ScriptFilesPath+"\\psm-list.txt",8,1);
I didn't script JScript since december so i'm pretty 'rusty' right now
gotta finish WLMini Music Player...