Hi
Yes, use policy NAT eg.
assuming tcp and you are translating the source IP addresses to 192.168.5.10
access-list pnat permit tcp any host "ip address" eq "tcp port"
nat (inside) 2 access-list pnat
global (outside) 2 192.168.5.10
Then what you need to do is update your crypto map access-lists to reference the natted address ie. 192.168.5.10 in addition to what they already reference. Obviously this needs updating at both ends.
HTH
Jon