ok i tried and this is what is happened .
when i leave the the secondary lan card on auto and also leave the new pc lan card on auto and this is what i have recieving
and when i try to bridge the connection this is what i have recieved
no its not vpn . evey pc in my network cable has assigned an ip address
so first i tried with 8 switch . i just have to change the mac address of other pc but what happened in that if one pc is browsing other pc internet does not works . but both computer in in network so my friend told me to do lan to lan sharing network .
so is there any way i can share my same net with other pc ? waiting for reply thanks