I believe that the modem provided by BSNL that has wireless connectivity can be used as wired router too.. The ones i have come across can be.
u can buy a dlink switch.
PM me to get one 2nd hand.
After getting the Dlink switch, u can configure ur modem to dial automatically using your password. One wire goes from Modem to Router. Then from Router 2 wires go to the 2 PCs. Both PCs can be used for Internet use and gaming too.