Okay, so I'm having trouble installing Galacticraft. We drag the three downloaded files into the Mods folder, and launch, hit play, and we never get the Mojang screen. No crash report, no new window that appears. We're using a PC, with version 1.7.2, and we have the current Forge version installed. We have other mods working fine - Buildcraft, Millenaire, Railcraft, ATV, ChemLab, Mr. Crayfish's Furniture - but this one has stumped us (myself and my 9 YO son).