What he means by using tar is that .deb packages are nothing more than compressed tar archives. You'll need to uncompress and extract the packages in question and combine them. To find out which compression it's using
$ file PACKAGE.deb
So for instance, if I extracted these files out of one:
Code:
/etc/config1.conf
/usr/bin/firstbin
And these out of another:
Code:
/etc/config2.conf
/usr/bin/secondbin
/usr/man/man8/secondbin.8.gz
You would combine them into one archive that contained:
Code:
/etc/config1.conf
/etc/config2.conf
/usr/bin/firstbin
/usr/bin/secondbin
/usr/man/man8/secondbin.8.gz
Of course you'll also need mind the install scripts and whatever else is contained in those sorts of packages. I'm not familiar with them myself. Obviously you'll need to do some research on the .deb structure. Here's a start:
http://en.wikipedia.org/wiki/Deb_(file_format)