With this DLL you can add all your resources to tar archives (for example with 7-zip) and then extract it when your game needs it.
Or you can create your own program to manage tar archives, because it can even add files.
It has not many functions yet, but I'll add more, if you like it (compress with gz, rename files, extract directory, ...).
There are two versions:
The GM6 version (with dll and scripts + example (help is in game information)): Download GM6
and the GM7 version as extension (+ example (help is in game information): Download GM7
Please report all bugs! And post your comments and suggestions to this dll!