dumb mistake help

[cstorm]

ok, been working on a map for about 2 years on and off, almost released it when i got a bad virus and had to redo my computer, now i did save the file of the map on a backup harddrive and thought everything was good. tried opening the file and realized, i forgot to back up the custom data from the map. so i am missing data and can't open in WE or in game, is their anyway to open it again? the custom data was only a few pictures i believe