There's a nice little piece about the carvings in one of the Hidden Histories progs -
http://www.bbc.co.uk/iplayer/episode/b00yd7f4/Hidden_Histories_Series_3_Episode_3/
It's the last item in the programme (last 10 minutes) and features George Nash explaining the carvings plus a bloke laser scanning the entire tomb to produce a 3D virtual model.
#Goff - I didn't get chance to watch the rest of the program but it includes a 'cursing well' if you're interested.
-Chris