Once again; I go after what ive read, not from my own experience since i lack that.
The rollover technique? I can't say more then "roll out of your body"- from SP. Either it's just the brains dream body that should be rolled out, or it's the fact that you're sure you're rolling sideways, but since your body is paralyzed, it's quite a mindfuck and the next phase occurs. I apology for not giving a clear answer to that one. I myself haven't yet felt SP, i guess. I laid still for about 2 hours, felt the "soda" feeling in the legs, arms and finally the spine. Tried to roll - worked for about 60* additional degrees. Then my real body begun to move slightly with it, and i stopped it.
My guess is that i wasn't in complete SP. I did imagine the bed going rather diagonal, moving for vertical. Never reached vertical, i didn't managed too. But i felt that my soda-like "spirit" (?) was halfway out of my body. So i guess it's a technique like the rope thingie, which i couldnt manage at all.
And about the eyes. I still got no self experience, but i would really recommend that you keep them closed until you're in OBE - if anything.