I was able to successfully install AltFw/RW_Legacy firmware on my device through the script in Sh1mmer (Easiest way for me, mostly just plug&play) and was able to install Windows 10!
However, the touchpad drivers from coolstar.org do not seem to work, as the touchpad still does not work. In device manager, it is listed as “The device cannot find enough free resources it can use. (Code 12)” under Chromebook Elan Touchpad.