The iMac G5-Aug 2004's file name might be imacg5_20.pdf/imacg5_17.pf
ALS models-not sure
iSight-uses a putty knife like tool, acccording to Macintouch.com
To get the official Apple service manuals:
-you need to have a GSX account with Apple (i.e. you need to be a AASP)
-go to gsx.apple.com
-log on there with your Apple ID and then, GSX account number.
Notes:
-To access the hard drive, the display bezel is removed first, and then the film covering the insides of the iMac.