I don't know how to use Unionfs so this info is for knoppix installed to hard drive.Load the Konsole screen. Type su so that you are the root user (like an administrator). Then after pressing ENTER type dselect update or type apt-get update. This updates the links to the download sites (I think) and you will see the conections to the ftp sites scrolling down the page until you get a message that says some index files could not be loaded or somethng similar. If you don't do this the packages won't download. Then install the package you want using apt-get <package name> e.g. apt-get openoffice.org , apt-get tomcat5. To delete software use apt -get --purge remove <package name>, but be carefull as stuff may be deleted that you still need and not everything is avilable for re-installation. If you read the text when deletinh/installing it will say which software is going to be installed, what extra packages will be installed with them, what will be removed if you install the packages as well as what suggested or recommended packages are available.If you look at the remastering howto which is under the Documentation tab at the top of the screen,, you can find most of the basic codes for changing knoppix.I haven't tried Unionfs yet, but I think if you create a persistent home on your hard drive (KMenu------KNOPPIX-----configure-----create a persistent home), baring in mind though that Knoppix can't write to Windows NTFS partitions, then I think you can boot Knoppix, save and remove packages etc. without having the whole Knoppix disk installed. type Unionfs into search as Like I said I am not sure