PS -> PDF?

[Stacia Hartleben]

I have a question about converting file formats. In TexnicCenter there
is an option to build a PDF by first going to PS and then PDF. I need
this because I use Qtree and it won't display correctly unless I go
from PS to PDF. How can I get this conversion? I'd like to have it so
I can just click on the PDF button and have a properly displayed PDF
converted from PS. Is this possible?