how to sideUpdate a app?

is there a way to side update a app ??:confused:

No because it technically doesnt exist, you have to install a new version if you get An update.

I think it 'updates' when you side-load over the existing app.
I think that's what happens with official apps so I assume the same with Android apps.

To update Kindle I had to uninstall it and reinstall the update. Any other way I ended up getting two version of Kindle on the PlayBook.

This may be because the apps were signed by different people though.