try this link :http://ip-address-ace/bin/csm2aceI did a migration but the converted config was not useful for us. we had to do the converstion manually (3912 line of config)

check this link : http://www.cisco.com/univercd/cc/td/doc/solution/ace_fwsm.pdf

you can exclude the https and http from your cropty access-list in your case it should looks something like this:access-list 101 deny tcp 172.19.18.0 0.0.0.255 any eq httpaccess-list 101 deny tcp 172.19.18.0 0.0.0.255 any eq httpsaccess-list 101 perm...

you can try to lower the mtu on the outside interface (exp : mtu outside 1420)

The configuraion looks good but for the default route I think it is better in inject to EIGRP on the core router (ip default network or redistribute static..)