Trigger by package install

Hi, I am creating my own package and I need to create a trigger which will be activated, when other packages are installed/deinstalled. I found in manual, that trigger can be dependant on file change, but not on package change. How can I effectively bind the trigger with a whole package? I can

create a package for multiple debian versions

Hi, I am working on a autbuilding system to build my packeges. I want to make packages for both lenny and etch version. But the package changes some other aplication's config and the configuration is different for both version - the postinst and postrm scripts are totaly different. The basic p