The new codex no longer allows actual looted vehicles like the previous codex did. You ARE allowed to use a Rhino model as a looted wagon OR battlewagon but it would not have any of the Space Marine Rhino stats or rules.
Here's a quote from a previous post which might help you:
"My first BWs were all custom with 3 Skorchas or the Auto-hit Zzap gun with 2 twin-linked Big-shoota. Everything could fire back in the day.
I really think the Orks got hosed the most with 5 ed shooting rules on vehicles. There should be a rule with orks that any assault weapon,
BS, Skorcha, Rokkit, is considered a Defensive weapon for vehicles. Also we lost our vehicle mounted force field from Armageddon, that was awesome!!!! Don't get me started about losing Spike's n Blades
Anywho time to stop living in the past!
The setup I use in most games 1850+ is 3 KillKannon, DeffRolla,
RPJ, Armor Plates, grot rtiggers battlewagons
HS choices. 10 Burnas, 1
BS Mek, and 1 Big Mek with
KFF in the Middle one with 2 squads of 12 Slugga Choppa,
PK Bosspole Nob in both flanking wagon. I use the Leman Russ model for the wagon. I also put a reg Kannon on each for Weapon Destroyed results. I run all 3 shoulder-to-shoulder up the middle. It is a huge fire magnet. Some games the Burnas never fire a shot but attract so much attention my 12 bikers with Bikerboss run around unmolested. The 2 boyz squads mostly just take objectives.
Also with the 3 BWs forming a wall my old-style trukks hide behind them completely. One could even give the 12-ork boyz squads a trukk, deploy on foot the first turn, let some burnas or Tankbustas (who also got robbed not being tank hunters) take the trukk. The boys then jump in the Wagons. I posted a proposed rule earlier about how it should be possible for a mob of boys to go from one open-topped vehicle to another open-topped in one turn. "
That quote was from this forum:
http://www.dakkadakka.com/dakkaforum/posts/list/246701.page#906775
Hope that helps,
PipeAlley