custom headers for unnumbered chapter*

I have few unnumbered chapter*s.

I manually setup the headers. My right page has my chapter title:

  \fancyhead[RO]{\nouppercase{\textsf{\leftmark}}}

But am unsure how to get my headers done for the unnumbered chapters. I 
still have titles for these unnumbered chapters. Any suggestions or 
examples?

I tried manually setting this fancyhead[RO] and also define \leftmark, but 
that caused changes beyond.

  Jeremy C. Reed