manual update of selected packages using binaries

Hi,

This is a generic question actually, but thappens for me on SPARC-32
given the unavailability of binary packages and selectively compiling
what I need.

I have built several packages, saving the binary on one system.
It is not a full repository, I just have in a directory dozens of
packages (which I can gladly share).

I want to use them to upgrade another system.

Naively would be "pkg_add -u *.tgz" but this would not only upgrade, but
also install everything else.

Would pkg_rolling-replace use the binary packages? I suppose not.

Any ideas?

Riccardo