[CentOS] OT: configuring xming to know putty's not in a std. location

Is there some way to do this? I've got the current putty (actually,
putty-cac), pageant, and plink in my user's Downlods directory - neither
he nor I have admin authority on his laptop, and Desktop support's
teleworking today - but I can't seem to find a way to configure xming to
look there for putty.

Or is it start putty, *then* start xming?

      mark