Dear Andrea_73,
Q 1: You can do the Small Universe meditation without the CD. You do the visualization on your own and hear/feel the sounds/vibrations from memory at each point as if you were actually hearing them.
Q 2: Yes.
Q 3: Think of "feeling the energy" as a tactile/kinesthetic visualization. Same thing goes with the "hearing/feeling" the sounds during the Small Universe when doing it on your own. Some people are stronger auditorially, some are stronger visually, some kinesthetically.