Run the install file with a -R at the end. Do not reboot the machine. Go into your WINDOWS folder and copy the setup.iss file to the location with your install file.
Then, in the future, you can run this command to get it to install silently:
D:\Downloads\ACEMCP593PRO.EXE -s -f1"D:\Downloads\setup.iss"
Substitute d:\downloads with whatever folder you saved the install file in. For more info on InstallShield installers, go
here.