You will just have to do a 'Batch Export' of wav files from Cubase, and place the files on separate tracks in Reaper. There surely/sadly is not a way to get automation or plugins/settings to transfer between any DAW without spending $600 or so on software that claims to accomplish this. Even then, I would be wary of the efficiency/accuracy of those programs myself. There is just too much difference in software and the way things are handled.