One option is to use the the 'Print VI to Printer' method. Beware that invoking this method repeatedly with complex front panels has caused me graphics problems in my VI's display that persist until the development environment or the built .exe app is exited and re-entered.
See: http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=5065000000080000005F5A0000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0&USEARCHCONTEXT_QUESTION_0=spaz+print&USEARCHCONTEXT_QUESTION_S=0
NI has confirmed this to be a bug in 6.0x and 6.1 and has indicated that it will be fixed in the next version.
I was forced to fall back on the Append Front Panel Image to Report.vi in the report toolkit. Which does not produce printed graphs of as high as quality as the Print VI to
printer method.