In the configuration below I've set up a tunnel-group name that is the same as the VPN-tunnel peer. Is this something you have to do or could you just call the tunnel-group anything you like?
isakmp policy 1 authentication pre-share
isakmp policy 1 encryption 3des
isakmp policy 1 hash sha
isakmp policy 1 group 2
isakmp policy 1 lifetime 43200
isakmp enable outside
crypto ipsec transform set FirstSet esp-3des esp-md5-hmac
access-list l2l_list extended permit ip 192.168.100.0 255.255.255.0 192.168.1.0 255.255.255.0
tunnel-group 10.10.10.1 type ipsec-l2l
tunnel-group 10.10.10.1 ipsec-attributes
crypto map abcmap 1 match address l2l_list
crypto map abcmap 1 set peer 10.10.10.1
crypto map abcmap 1 set transform-set FirstSet
crypto map abcmap interface outside
The tunnekl group should be the IP address of the remote end - as this is used as the ID. The only time you should use a specific name - is if you are authentication by certficate.