It would be better with a decent map, to provide more torque. I've seen the guys at tdiclub.com with the same engine, who tow a lot, and have found that with a good map that towing is a lot easier.
You say you like your car un-mapped??! How can that be so?? Is that because you had a map and didn't like it? It was probably a BAD map, so you would be much better off getting a GOOD map from a reputable supplier.
Not everyone is in to mapping,i'm 1 of them
Would you care to explain why, as I can't think of any reason apart from insurance reasons.
The OP is also asking about towing, and I've read reviews on tdiclub where people have used a mapped 90BHP TDI to great effect towing, and they said it was a lot better than unmapped.
Would nozzles give enough on their own or would it make it smokey? Would re-map be as smooth as standard map?
Going to pick up the caravan tonight do I'll see how it performs, only to do 25 mile with it but at least I know there's no problem getting more torque if needed. A local fella says nozzles and re-map should see 140-145bhp and bucket loads of torque?? Would this be about right?