|Don't worrie for your English, mine is even worse and here you can see the worst samples of English you never supposed to face (from English mother tongue people too|
This is because people who learn English (or any other language) as a second language get taught proper grammar and spelling. Sure us "English as a first language" folks do too, but most of us don't pay much attention. That's why we're usually the worst offenders.
I would like to connect both PCs on internet and intranet also to have the possibility to print with the ethernet printers. Intranet with CISCO 4 ports and internet with netgear wireless (4 ports wired)
Since you don't seem to need to have them on separate subnets, the easy solution is to plug the computers and printers into the LAN ports on the router with internet. If you don't have enough LAN ports to do this, you have two choices:
1) Buy a small switch (8 ports) and plug it into a LAN port on the router with the internet connection, and then plug all PC's and printers into the switch.
2) you could plug the second router in to the internet router and use the LAN ports on both routers to plug all PC's and printers in (providing that gives you enough LAN ports).
If you wish to try using your router, click on my name above and read my "how-to" guide on "adding a second router". You would want to go with the "LAN port to LAN port" connection scenario. You would need to put the second router on the same LAN subnet as the first router and disable DHCP on it.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.