Hi Linas,
linaro-dev isn't really the correct place for these questions. Have you tried to seek support from Igloo Community [1] yet? It's the official support channel for all things Snowball.
but I don’t find any doc mention how to used GB pre-build binary , could I have the instruction for this?
Just gunzip and flash [2] it.
We also find v5 and v7 also has two images as below link, but I have V10 board on hand , I need to used which one for V10 board
You should see v5 and v7+ (note the '+'). For v10 you need v7+.
Kind regards, Lee
[1] http://igloocommunity.org/support/Get_Involved [2] http://igloocommunity.org/support/Flashing_howto