I really liked this mod, however I found that expert AI's resource multiplier is too ridiculous. However after a thorough search I really cannot find a way to edit existing mod using the official mod tool, is there any way to edit your mod?This is for personal use only and I won't be uploading my edit.

PS: I already unpacked your .sga file and found the file "default_skirmish_hardest.rgd" and edited it, but I couldn't found a way to repack into .sga file. Please help me.