Hi
Safe Mode should give options to load to a command prompt.
You dont mention what drivers you are loading and where they load to, that fix the problem.
Is this a Catch 22 situation where the required drivers are on the encrypted volume and cannot be accessed until the volume is active, and the volume isn't active until the drivers are loaded and the encrypted volume is active?
If so I would reduce the size of the volume and ensure the drivers are outside of the encrypted volume and accessible.