2611 VPN

[mrfroggigger]

my question is i'm wanting to connect a remote office to our main office. the remote office has sbc yahoo dsl installed with static ip's assigned. the main office is connected via a t-1 line into a cisco 2611. i was thinking of doing vpn to connect the remote office to the main office but was reading about special IOS software to make this happen. i don't know if my current IOS will work or if i have to upgrade it, if so what version do i need?
here is a sh ver from my main router

Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IO3-M), Version 12.1(13), RELEASE SOFTWARE (fc3)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Wed 30-Jan-02 21:52 by kellythw
Image text-base: 0x80008088, data-base: 0x80890920

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

R-MAIN uptime is 7 weeks, 2 days, 9 hours, 2 minutes
System returned to ROM by power-on
System image file is "flash:c2600-io3-mz.121-13.bin"

cisco 2611 (MPC860) processor (revision 0x203) with 26624K/6144K bytes of memor.
Processor board ID JAD05330MGT (3986251136)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
Primary Rate ISDN software, Version 1.1.
2 Ethernet/IEEE 802.3 interface(s)
25 Serial network interface(s)
1 Channelized T1/PRI port(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102