Hello Syed,
first not down SIM is created to run not to install.
As u said u build the zip that is a package with which u are not required to download the product during the installation.
Now do the simple thing , select the products when u got the list of products , go to next.
You will be asked for give the details of license or the oraganisation, fill it and accept the agreement.
After this you will asked for the prerequisites which is automatically done by SIM, it will allow to go next if your system will fulfill the prerequisites otherwise u will get error and u have to end the session and try again after fulfiiling the prerequisites.