FGFG's system can be found under Open > Community Systems > Aristotelic Solar System.
Something else to try:
1 - Open "Our Solar System" (under Standard)
2 - Right click on the earth and select "Set to Center"
This shows all motion (and trails) relative to the motion of the Earth (as if the Earth is standing still).
You can do this with any body in Universe Sandbox.
It would be cool if it was possible that the Andromeda and Milkyway galaxies already had a speed when the simulation starts...
That's a good idea, as the collision is a bit slow to get going.
Something that I like to do when friends come over is to load up a galaxy collision simulation, put it up on my television, slow it down so that the motion is very subtle (decrease the time step), and turn on Camera orbit.
These are the approximate settings that I have used:
Time step = 5000 years
Camera Orbit = .2 (degrees of rotation per sec)
Particles Multiplier = 3
It's kind of like slow motion art.