How to use a 4.7 GB DVD for copying several miniDVDs

I have a Sony DVD Handycam, and want to copy 2 or 3 miniDVDs (1.4 GB) containing video into a 12cm 4.7 GB DVD, using Nero (OEM version). I tried once but the 12cm DVD became full. Could someone please help me tell how to do copy several miniDVDs into one 12cm DVD? Thanks

Use NERO Recode it will compress the file to fit DVD5. For that you will need full versoin not OEM.