alright here we go

i have an ipod 4g n iam using windows xp..i have all the songs in itunes but alot of the songs now like 98% of em cant be played cuz it says they cant find the original..n wat i did was all the song s in itunes were draged into in itunes becaus i search on the comp for *.mp3.....now ill sumarize cuz i prob lost u

i have songs in itunes that wont play cuz they cant fins the originals also all the songs i download from lw wont go into itunes anymore they go windows media player....wat i want to achieve is be able to get my itunes to work w/o having to search for every song n to get my lw songs wen downloaded into itunes quick n easy..
thankx