Hi Ryan,
1. You will need to download the TI Sitara SDK version 06.00.00.00 from the TI site: http://software-dl.ti.com/sitara_linux/esd/AM335xSDK/06_00_00_00/index_FDS.html
2. Install SDK with to run: <SDK_folder>:~$ ./ti-sdk-am335x-evm-06.00.00.00-Linux-x86-Install
3. You need to run the: sudo <SDK_folder>/bin/setup-package-install.sh script that will install some needed packages to your host linux system. The included toolchain is Linaro GCC 2013.03 (crosstool-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03). The toolchain resides in <SDK_folder>/linux-devkit/sysroots/i686-arago-linux/usr/bin.
Now you are installed all needed packages and ready to use the u-boot, kernel, filesystems or to modify and rebuild u-boot/kernel and create sd-card.
BR
Ivan