Change default to pdflatex

[Kevin Middleton]

In LyX 1.4.1 on OSX, how can I switch the Cmd-t PDF generation  
keyboard shortcut from ps2pdf to pdflatex? I think I just want to set  
pdflatex as my default LyX -> PDF conversion. I can't figure this out  
in Preferences.

Apologies for posting two basic questions on the same day. I  
reinstalled 1.4.1 today trying to get instant preview to work  
correctly (it now does, but the pdf generation shortcut switched to  
ps2pdf, which does not work with my pdf figures).

Thanks
Kevin