Can i get a necro!
Interesting i thought of doing the same thing this morning and was given a bat to do it but didn't like it because it didn't list the file size.... So after messing around and missing the person to ask twice i stumbled upon how to get a list of everything and subfolders along with file size in command prompt.
first you make your way to your collection folder in CMD prompt, i cheat by copying and pasting the folder after CD though it acts odd and don't show until i type c:, don't ask why i don't know dos well.... then type or paste
dir /s > Modlist.txt
and in that folder will appear a file named "Modlist.txt" mine is 2.4mb in size and has 31613 File(s) 47,096,387,092 bytes i attached it below it's a bit of a mess