Hi Bernard,
You can do it, but not for PS3 on DVD. I wanted to tell something else. The main thing is that we must distinguish two aspect. Datafile format and medium format. Datafile format can be AVC (AVCHD) you have created by Sony Vegas 9 or MPEG2 HDV format and many more. Medium format is the structure of folders, data file formats etc. The medium format may be AVCHD, Blue Ray. Theoretically both formats may be burned on any medium (BD-R, DVD-R, … etc). If you want to burn your HD film with authoring process (It means with menu) by DVD Architect v5.0 you can create only Blue Ray media format on any media (BD-R, DVD-R, DVD+R, DVD-RW, .. etc). If you use the DVD medium, you have DVD medium with Blue Ray media format only. Not an AVCHD media format. DVD Architect v5.0 is not able to create AVCHD media format. This Blue ray media format can have more data formats of film. The data formats AVC, VC-1 and MPEG-2 are acceptable formats for Blue Ray madia format. If you have a film in AVC format from Sony Vegas, you can create only Blue Ray medium format with AVC files on DVD media. It is NOT an AVCHD media format. And PS3 is not able to play this disk, because is expects AVCHD media format on DVD. If you want to burn your AVC film for PS3 by Sony DVD Architect v5.0, you need to use BD-R disk! But other Sony players (BDP 360 etc.) are able to play Blue Ray media format from any medium. It means HD film prepared on Blue ray medium format on DVD. If you want to make an authoring film with menu prepared by Sony Vegas 9 as AVC and burn it onto DVD medium playable on PS3 you should use another software like Nero 9 Reloaded.
Good luck in your video.
Stanislav