Anyway to update the "popup message" from the %post section?

[Dave Alden <alden@xxxxxxxxxxxxxxxxxxx>]

Hi,
  My %post section takes ~30 minutes to run -- during this process the
message on the console is "Installing Bootloader" (or something close to
that).  Is there some way to update that message, or at least have it
say that it's working on the post install script?
...dave