When you do "apt-get install" where are the .deb files stored?
Solution 1:
They're stored in:
/var/cache/apt/archives/
unless you've issued a:
apt-get clean
Solution 2:
Maybe you just need:
apt-get download mypackage1 mypackage2
it will download given *.deb files to the current directory. No need for root.
Solution 3:
If you had already issued
apt-get clean
you can take a look at these pages to learn about replicating the same package configuration on the other machine