FWIW if you can make a folder in your home, let's call it 'scratchpad'
then copy your package over there
in KDE, just right click on it and say 'extract here'
remember packages are just gzipped archives, so when it extracts into the 'scratchpad' folder it will create a directory tree similar to where the package tool exploed the gzip file on your hard drive when you install it.
now since you basically have a folder structure, you can go thru all those folders, see what and where it's putting files on your system.
so if you put a package in that puts the binary/executable for a program called 'xmms' for instance, in your 'scratchpad' you'd have a subfolder & file called /usr/bin/xmms then just right click on your k-menu, hit menu editor, go up to the the category of the mutlimedia for this example, then click up top for new item and add in all the related info.
just so you know the icons are usually .xpm files