EBO Editor
http://www.nba-live.com/download/pafile ... le&id=1219
BigGUI
http://www.nba-live.com/download/pafile ... ile&id=964
1. Get BigGui and open xxxx.viv in the SGSM/Stadia folder. Then export xxxxstd_trans.ebo to the desktop or where ever you want it.
Export looks like this

(xxxx would be the team abbreviation. In this tutorial I am editing the Raptors stadium so that would be toro)
2. open xxxxstd_trans.ebo with the ebo editor. Go to the XZ Plane at the top, this will give you top view of the stadium. Now zoom out to where you want it. (If you hold shift you can zoom out) You will see 3 parts to the right. Part0 is the crowd. So you can uncheck the others if you want now click back on Part0. Now click on the select button and draw a box around the crowd all the boxes will turn red when you select them. Make sure you have all of them selected. Now go down to color, you can double click it then choose the color you want. After you click OK It will ask you "The changes will be applied to all selected vertices. Do you wish to continue?" Click Yes. Now go to file click save then close the EBO Editor. Now put xxxxstd_trans.ebo in your SGSM folder. That is it you are done.

If you want to lighten your crowd I suggest using the light gray color rather than white. White is just to bright. If you want to lighten the entire stadium you would edit the objects in the xxxxstd.ebo file, again I would suggest using the light gray color.