Download the Minecraft Launcher - Portable USB version available

Choose you download :

Put your Minecraft on an USB key or on your Dropbox, and play everywhere, with all your saves, configurations, textures packs, server list...

Unzip the file in the folder "version" of your ".minecraft" folder, then create a new profile and select 1.6.4_opti-minimap.

Minimap mod included (rei's minimap mod included), players entities are enable on the server, so you can see the players on the minimap
Performances and HD texture mod included (Optifine HD included), it run really faster than the vanilla minecraft and you can install, HD texture packs on it.
Quick access to a list of every crafting recipe for blocks and items in the game ! (CraftGuide included), Type G to open the guide, and just click to see every crafting recipe in the game.
"The Better Animations Collection Revived mod seeks to enhance the Minecraft experience by reworking some of the in-game creature models to fit more and smoother animations." "It aims to add a subtle effect to put a smile on your face !" :D

This launcher install a modded minecraft featured by Blocks And Gold in the .blocksandgold folder,
Does not replace your previous configuration (you can use both),
You can play on all servers with the launcher,

The launcher is facultative for building, crafting purpose,
Launcher is mandatory for pvp, or kill powerfull mobs, no cheaters during pvp in our server.
Launcher is mandatory for getting diamonds.You need it to access to the deepest layers.