Just a quick note, you DO NOT need to REFORMAT your SD CARD to a 2gib size if you already have homebrew installed and the correct IOS's. however, if you run into problems its possible you will need to format in that case instability can happen as you increase sd card size.
Step 1:
Download Project M
http://smashboards.com/threads/1-3-re...
Step 2:
Download SD card partitioning Tool
https://www.partitionwizard.com/downl...
SD card is required.
This method works with hackless or homebrew
Extra(PM without brawl iso)
Install these cIso’s
https://sites.google.com/site/complet...
And PM homebrew
http://projectmirror.no-ip.org/
Source
/ how_to_boot_pm_with_usb_loader_gx
Thanks!