Cisco Routers :: Combine Dynamic And Static NAT On A SR520?

I'm trying to combine dynamic and static NAT on a SR520. My dynamic NAT is specified with:ip nat inside source list 1 interface Dialer0 overload access-list 1 permit 192.168.0.0 0.0.7.255 In addition to this I want to perform static NAT for a couple of selected internal hosts. I can do this:ip nat inside source static 192.168.1.5 10.85.10.2 which works fine but means that the source address 192.168.1.5 is translated to 10.85.10.2 for all destination IPs. What I want is for the above static translation only to occur for a particular destination subnet.To accomplish this I have tried:
 
ip nat inside source static 192.168.1.5 10.85.10.2 route-map toOtherSite
route-map toOtherSite permit 10
match ip address 150
access-list 150 permit ip 192.168.1.0 0.0.0.255 192.168.10.0 0.0.0.255
 
But this does not appear to work. Instead it seems to render the host 192.168.1.5 unable to progress through the NAT, whether the destination subnet is 192.168.10.0/24 or not, and I can't work out what I'm doing wrong.