Update 3: If you are using/trying to use/gave up on using Thanemod, and have been getting errors when trying to run ME3Explorer to add .mods and .tpfs (textures), please post on the me3 explorer forums : http://me3explorer.freeforums.org/
PLEASE STATE:
A. That you are using ThaneMod
B. What version of ME3 Explorer you are using. Even if it is the one that ThaneMod came with. The version is an old & outdated version of ME3 Explorer, & likewise has become the major suspect to the issues being reported on the forums since ThaneMod was released.
Update 2: It is highly recommended that you use the ME3 Explorer that comes with the Thane Mod. Mo