rem Windows XP (thanks to tuvok)

rem Modify the following values
rem 3ffe:80ee:1234::1 - Choose any IPv6 address from the range
rem you've got from XS26
rem 1.2.3.4 - PoP's IPv4 address

netsh interface ipv6 install
netsh interface ipv6 add v6v4tunnel xs26 YOUR-IPv4 POP-IPv4
netsh interface ipv6 add address xs26 3ffe:80ee:example:1::1
netsh interface ipv6 add address xs26 3ffe:80ee:example:1::2
netsh interface ipv6 add address xs26 3ffe:80ee:example:1::3
netsh interface ipv6 add address xs26 3ffe:80ee:example:1::4
netsh interface ipv6 add route 3ffe:80ee:example:1::1/128 xs26
netsh interface ipv6 add route 0::/0 xs26
netsh firewall set adapter xs26 icmp all=enable