i remember that there was only one real reason to have kde3, quanta, it seems that is still the case
other than that, i can't think on a reason to have kde3
if it doesn't run on older hardware the options like gnome, lxde, xfce and e17 should be considered
the old kde and the old pclinux have many holes, in kernel and in kde apps
any reason to have it, you should make them disappear because it is 2 years dead now
don't wait like that user asking for help on a 5 year old distro dead that won't let him save his own files on a backup
i ram last week a celeron with 512 of ram and kde4 worked impressively well except for the video card, a sis showing what only i could describe as rain on screen, except that older and limited hardware can work with pclinux 2010 very well, if kde4 is not your thing there is options
the other option is buy repos on dvd, it seems that is still posible to find 2009 repos on dvd to buy, keep a local repo and avoid internet usage for this specific task