If you have the minecraft not enough memory error while using the Feed the Beast launcher here's how to fix it.
The easiest way to fix this problem is to edit your profile in the launcher (this only works if you have the new minecraft launcher)
Step 1 - Start the FTB launcher by double clicking FTB_launcher.exe
Step 2 - Click the options tab in the top
Step 3 - Slide the ball next to RAM Maximum (MB) to 2GB or more - Launch the game!
Step 4 (optional) - If for some reason FTB still crashes, press Advanced options in the options menu of the launcher shown in the picure above
Step 5 (optional) - After Additional Java Parameters fill in -Xms2G -Xmx2G
make sure to use capital letters as described or you could get an error
Still having problems? Comment below and we can help each other out