Hmmm, it would not be the same as a rhino as the pred has no troop transport facilities.
Did you have the millenium falcon toy as a kid? I kinda imagine it a bit like the gunners chair in that, with a seat and gunner attached to the turret that can rotate 360% inside the tank. This should be easy enough to knock up in moel terms- just convert the sidecar from a plastic attack bike.
Don\'t forget its gonna need some biig battery pack to power them lascannons too!
Also Forgeworld do a Democles command rhino with a detailed interior with 2 marines at control panels along the right hand side of the interior- maybe they would crew the weapons?