ChangeLog :

1.03.13

 * Fixed issue launching under windows xp * Fixed issue for users with malfuntioning proxies * Changed: all Minecraft launching now runs through newer launch code -- older versions now use custom wrapper to handle the launch animation (should fix numerous issues launching pre 1.6.x packs)

1.03.12

 * fix issue causing additional directories to get scanned for mods in legacy Minecraft versions

1.03.11

 * Fix for authentication crashes for some users * Fix for some users having crashes when loading pre 1.6.4 modpacks

1- download file into your computer

Download

•  Feed The Beast Launcher for Windows 64bit.
•  Feed The Beast Launcher for Windows 32 bit.

2-enter any nickname and password and login .

3-chose your mod pack ….

4- enjoy