I successfully installed Forge for Minecraft 1.6.4. When I tried to add a mod called "Too Much TNT" I put it inside the mods folder in the .minecraft folder and it didn't work. Its my first time using and downloading mods, so I don't know much about this.
Which version of Too Much TNT did you use? How did it "not work? If the game cashed, post your crash report here (in a spoiler).
The version of the mod is 1.6.4 only for Forge. When I started to play Minecraft with the Forge profile that I made, I went to he mods section in the main menu but the mod wasn't there. Even when I went to my singleplayer world, there wasn't anything related to the mod such as other types of TNT's.
When you are in the MC Launcher, go to the profile called "Forge", click edit profile, and under the version, make sure it is on the Forge version.
(It's really long and crazy, you'll know when you see it)
Hope this gets solved. Thanks!
(It's really long and crazy, you'll know when you see it)
Class: Dark Thaumaturge