Each Gong piece, unlike the other collectibles, is a puzzle, which are not optional.

i have tried everything that people have told me for getting the last gong piece from the mosaic but still nothing, can any one recommend anything before i go completely bald!!!!!

Neo, you shouldn't have a problem...unless you have the first version of the game. What version do you have? To find out, just goto the menu and look on the bottom left hand corner.

Did you look at this thread (just above)
Problems getting the last gong piece!

version 1.00, would that be a prob ?

Yeppers! That one there is no way to get that piece. I'm sorry. You will need to goto the site you purchased the game from and download the newest version, as each site uses their own DRM.

Also you will lose your current game(s) and will have to start over when you install the new version.

Ouch. I feel so sorry for you. Losing all that progress...