When you say you want to create an AVCHD disc -- are you trying to create something other than a BluRay disc to be played on a standard BluRay player?
That can be done right in Premiere Elements.
Per Steve's question, I'd go with a BD (Blu-ray Disc). You can use either the H.264 CODEC, or the HD MPEG-2 COCEC. (Acutally, most feel that the MPEG-2 gives better quality in their tests, but also remember that all H.264 CODEC's are not equal).
For reference, here is a chart of Allowable BD Specs.
Good luck, and if you have more details on an "AVCHD disc," please share them,
I need to copy back to my HF10 Canon camcorder (in a memory card) the video I created with PE7 .
HF10 need a files structure similar to BluRay Disk. Nero 9 is good for this job (AVCHD DVD selection) but I would like to avoid to re-encoding all ...