@nathanalishous Heya...we (Hackers for Charity) were able to install RACHEL with a bit of hackery.
The USB method works but isn't the best solution.
Ultimately, we swapped the SD card with a larger one and modified some of the web interface files to give us a BRCK local website that included links to RACHEL running locally. The larger size allowed us to install a full version of RACHEL. Here is a pic of the local web interface integrated with RACHEL.
NOTE: We are not currently working on the BRCK as an end solution.
More BRCK/RACHEL development info is here and also here under the tab "BRCK Notes"
BRCK Project writeup here.