Java 8 update 25 is conflicting with Minecraft Forge version 1.6.4-126.96.36.1995. If your modded 1.6.4 profiles don't open, check your Java version, you may need to downgrade.
This tutorial explains the steps to create and manage your Minecraft profiles.
Keeping your Minecraft mods organised and easy to find
If you have Windows 7 or 8 installed in 64-bit mode, take advantage of running Minecraft on 64-bit Java.