apt-get question

[Brian Densmore]

Any way to tell apt-get to get something from "testing"
if you are running "stable". I suppose I could download
it and dpkg it. Although I'm not real comfortable doing
that just yet. I don't want to upgrade to "testing", but
I do want this one package that is only in "testing".
While I'm on the subject what are the downsides of "mixing"
package levels? Will it break apt-get?

Thanks,
Brian