having 2 debian installations...

[Christian Groessler <cpg@aladdin.de>]

Hi,

I've got 2 debian installations. Now after some while I updated one of
it in dselect to the newest packages. This was a 100MB packages
download from the internet. 

After installing the packages I was asked whether the newly downloaded
package files should be deleted. I answered no in the hope to use them
to update the other installation.

This is now my question, where are these downloaded packages located
in the file system and how do I tell the other installation that I
have these updates?

Thanks for your help.

regards,
chris