2 debian questions

1. How do I force an upgrade/install of package even if it breaks other
things? I know I asked this a few months back, but I forgot the answer
and could not find it in the archeive. Sorry

2. I see a package like "kernel-image-2.6.0-test0". I assumed that this
would install a precompiled 2.6 kernel. Is this correct? What is the
command to determine what kernel I am running?

Thanks for any possible help.