Snakebite05

I'm trying to install the ATI cats 5.7 silently using a setup.iss file. I run the setup executable with -R flag, and the setup.iss file is created. However, when I try to test that file out, using the -s switch, the install is silent but a dialog pops up at the end asking me whether I want to restart the computer or not. Is there any way to prevent this? I looked in the setup.iss file, and there doesn't seem to be a line pertaining to restart (usually, an line "BootOption=0" would appear to alleviate the restart after the install.) Any suggestions? Thanks.