I use on my AMD64 dual core this command line until
BindCPU.exe.
I have copied this exe into the Windows/System32 folder and use batch files to start games which have problems with dual core cpu's.
For DW I create a dangerouswaters.bat which contains only this line:
BindCPU 1 dangerouswaters.exe
that starts DW and bind the process only to CPU 0.