[TxMt] compiling *plain* tex documents with postscript figures

I would like to compile a *plain* tex document which includes some postscript (.eps) figures. The problem is that if I choose tex (or etex) as the engine the dvi file is correctly generated, but its not automatically converted to pdf, nor the dvi file is sent by the viewer (Skim). This is no problem with *latex* files containing eps figures, since in that case the command "Typeset & View (PDF)" converts the .dvi file to .ps (by running dvips) and the resulting .ps file to .pdf (with ps2pdf), and opens the .pdf file. Is there an easy way to get TextMate to automatically run dvips and ps2pdf in succession when the engine is tex or etex, instead of latex?

Cheers,

Artemio