[texhax] setting different fonts (in preamble?) for roman and small caps

[McAllaster, Douglas, CIV, OASD(HA)/TMA]

Folks,

I hope this is a trivial question.
I'm new to LaTex fonts for anything but the default (computer modern).

I'd like to use one font, say palatino, for roman text;
but I'd like to use another font, say helvetica bold, for small caps.

Can I set those for an entire document,
such that I can switch between \normaltext and \scshape
without a full NFSS font specification each time?

Thx, Doug McAllaster