Hello.
So if you have connected all your routers and PCs up correctly then all you need to do on the PC is at the DOS prompt type 'ipv6 install'
On the routers you need to do the following:
ipv6 unicast-routing
!
interface FastEthernetX/X
ipv6 address [your address here]
This link should give you most of the information you need on configuring and understanding IPv6 on the Cisco routers:
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-addrg_bsc_con.html
Simon