How do I ip-map?

I have a router with a public /25 on the WAN port and 10.1.1.0/24 on lan port.
I have a windows machine that I will be putting on the lan port and giving it 1.1.1.120.
How do I ipmap one of my publics to the 10.1.1.120 to allow remote access to the windows machine.

I have done this with star-os, but never MT.

TIA

http://wiki.mikrotik.com/wiki/Manual:IP/Firewall/NAT#Destination_NAT

Thank you, very helpful :slight_smile: