yup, the GoPro HD, a great bit of kit and I love mine but it does seem to create a number of challenges.
First up re positioning using the chesty harness;
As mentioned above you need to flip the mount and wear the camera upside down. you can then use inbuilt software to flip the pic or just use your editor to flip it.
If you don't flip the camera it's very difficult to keep the rider in front in frame as you have found.
Other mounts:
I tend not to use the chesty harness as I can't get a decent pic so I use the helmet mounts instead plus the frame/handlebar mount for a much better result.
Editing:
Windows Movie Maker is the most intuitive editor that I have found and I have tried many. Nope it doesn't have all the fancy features but it's easy to edit and produce a good movie
File type:
GoPro records in MPEG4 which Windows Movie Maker can't use in Vista or XP. However Windows 7 version of Movie Maker allows you to import MPEG4 files
File Conversion:
So that leaves you with the option of upgrading to Windows 7 or converting your MPEG files to avi and editing in Movie Maker. I convert the files using MP4cam2avi[/url], a free download.
Batteries:
The HD version has a rechargeable battery that is much better than the alkaline batteries required for the non-HD version and the charge lasts ages for me, easy to record all day and fill an 8GB card on one charge
The output:
Here's a couple of recent efforts shot in the Alps using the helmet mount and edited as above i.e. converting to Avi and editing in MWMM
Le Mont Jovet Enduro
Final Friday (for some rearward facing camera action)
plus a recent attempt at using the chesty harness again which confirmed my feelings that I don't really like the results.
Tunnel Hill