If you want PC2 to see PC1 as an address other than 10.1.1.2 then a static translation could be used to change PC1's address. for example;
ip nat inside source static 10.1.1.2 192.168.2.2
This provides a one - to - one static translation of the inside source address.
If you want the outside PC2 to be seen as anything other than 168.1.2 on the inside interfaces, you could use outside source translation.
for example;
ip nat outside source static 168.192.1.2 10.1.2.2
OR use both if you want both addresses translated.
Hope this helps !
http://www.kccommunications.com/htdocs/NAT%20and%20PAT.htm