1. The quote below will tell how to enable the warning for cameras.
Disclaimer: Obey all laws, do not speed, do not run red lights.
Now the fun part. By the looks of HackZ' screen, he imported POIs with red light cameras. This is nice, but does not give you warnings or anything, as those are just another bunch of POIs.
Now, to enable real speed camera functionality, we need two things:
1. List of speed camera settings.
2. Code that enables them.
Code is easy: I've posted my scripts in this thread: http://www.avic411.com/forum/viewtopic.php?t=17820
Getting cameras in: you need a specially formatted text file that has camera coordinates, type (fixed, mobile, speed limit, type, etc). I've had good luck getting the file from http://www.gps-data-team.com/poi/united_states/safety/
Make sure you download the file in iGO format.
Reading one of the INI files, you should be able to save the file on your storage card:
\Storage Card\poi\speedcam\
and that should work. I've just copied the file to the unit's memory in ...APL2\IGO\Content\SpeedCam directory. It is recommended to delete file already there.
Unit will think for some time and slowly convert the text file into an internal database format (.spdb and .spud for manual updates).
Now, the cameras should show on screen. If you use my script files, you can go to Warnings section of system settings and specify how you want to be notified of them. Default sound is rather weak, but apparently can be changed and nicely configured... Still working on that.
To add a new camera: Place a cursor on the map in the position where camera is at. Press Map Info button. Press Save As. There is a new option: Save as Camera. Select camera type, speed limit, and save.
Similarly, if you put the cursor on an existing cameras, the button changes to Edit Camera.
Have fun.
Since the free database of speedcams quoted above seems to be of questionable quality the logical solution is to get the database somewhere else. The problem with this is the other databases (like the one I use in this example from poifactory.com) are in .csv format which is nothing like the format iGo likes. After two days of searching I finally found a way to convert this filetype to something iGo does like, a .spud... hehe potato 
2. Anyway... First thing to do is have a semi-recent version of Excel and grab the spreadsheet/VB Script at the bottom of this post.
Caution: This spreadsheet does not seem to work on the latest version of Excel for Macs (2008) doesn't error out just plain doesn't work. I would assume this is a VBScript issue since Microsoft really hates to port programs in their entirety
3. PAY the $5 for the speedcam database from POI Factory. It will look something like this if opened in notepad.
-122.31507,47.82117,Red Light Camera .020yt,WA Lynnwood poi-factory Sep10 08
-111.8052,33.40804,Red Light Camera .01vx1,AZ Mesa poi-factory Sep10 08
Looks nothing like the files iGo likes right? But it does give all the info you need lat, long, and type of cam
Open the file downloaded from POI Factory in Excel and each of the comma seperated values (look ma I know what CSV stands for now!) should be in columns latitude in one longtitude in the other and text in the next two. What you will want is in the first two columns.
4. Open up the spreadsheet from the bottom of this post and copy the first column from the POI Factory CSV file and paste it into the longitude column in Speedcam Updates. Copy the second column out of the POI Factory CSV file and paste into the latitude column in Speedcam Updates.
All instructions from here on are for Speedcam Updates only! The CSV file from POI Factory can now be closed!
5. Click the first box in the Flag column and select new. Click on the box that says new and copy it. Select all of the boxes in the column by draging a box around them then paste. All the boxes should now say New.
6. Do the same as above with the Limit, Type, Angle, and Direction Columns. but the values to copy and paste are as follows:
Limit = 0
Type = Red Light Cam
Angle = 0
Direction = All Directions
7. In the cam number box you will have to number all of the cams by hand (all 2229 of them) unless someone more skilled with Excel than me can tell us how to have Excel do it for us.
8. Once this all done hit the check button. It will pop up with a few warnings.
9. Hit export and be sure to select the mio .spud format.
10. Take the file created and put it in /ap2/igo/content/speedcam. Also be sure to delete any other files in this directory.
Now congratulate yourself you should now have warnings for US redlight cameras.
) correct iGO format.
) uses and what iGO expects.