Thanks mmalves. I thought that dvd-rom booktyped dvd+r's behaved better when using udf only. If that is not the case then reading as .iso, and then burning would be far easier for me.
These discs will only be used as backups of my dvd-r's, and only read on a computer.
If I can just read to iso/img/bin, that would be great.
Edit: No particular reason for UDF 1.50, thought that might be better than 1.02