To run following scripts, open Command Prompt as Administrator.
Exporting:
To export app pools, need to run following script.
%windir%\system32\inetsrv\appcmd list apppool /config /xml > c:\"Folderthat you want to create"\apppools.xml
To export site pools, need to run following script.
%windir%\system32\inetsrv\appcmd list site /config /xml > c:\"Folder that you want to create"\sites.xml
Importing:
%windir%\system32\inetsrv\appcmd add apppool /in < c:\"Folder that you copied"\apppools.xml %windir%\system32\inetsrv\appcmd add site /in < c:\"Folder that you copied"\sites.xml