problem with music files on my new windows 7 pc?

i have a lot of music on an external drive

on my old pc that ran on vista all albums were nicely in alphabetical order and all had the cover art because my old reliable machine blew out because of a power surge

ive just changed over to this new machine which runs off windows 7

the files are no longer in order and many of my files no longer have the cover art on them

with the old vista machine files could be easily be rearranged by dragging file into a space between others, this machine doesnt let you do that it only seems to let you drag one file into another

when it comes to the cover art problem with the old system it was easily done by right clicking opening up properties and choosing a file in the customize tab this doesnt work on my new 7 machine

to most this might seem trivial but i am really OCD when it comes to music and i need to know how to get it all back in the right order with its cover art intact

any advice would be really helpfull because im nearly out of medication