There're no
official way to get this done, since otherwise people would like to hack into other's file, which is a bad thing. But as you said that it's your own game, then it depends on
how old your game was:
1. If it was made with AGS version prior to V2.5, it is possible to "decompile" the game and get back the separate game files, but only Pumaman has the tool and authority for this, you may try PMing him for info.
2. If it's made with AGS V2.5+, you're out of luck, as you'll see from the official CHANGES.TXT document that:
QuoteNOTE: It is now IMPOSSIBLE for your game to be de-compiled - even by me.
Take special care to backup more in future.
Even
if you find some way to break apart the files, you won't get the original scripts back any more, as they're removed in the final compiled game.
So always remember the motto:
Backup more, backup often!