Installing Older versions of ubuntu via repositories

[artursm]

Hi there. I'm using (k)ubuntu 8.04, and I wnated to install ubuntu feisty fawn without having to download an image and burn a CD. When I first installed ubuntu hardy, installing kubuntu was as easy as apt-get install kubuntu-desktop. Is there a similar way for me to install feisty?

Thanks

[CarlosNYB]

If you currently have Hardy Heron, you don't want to install Fiesty over top of it because Fiesty is older.

[artursm]

I know it is, but I need to have it available for compatibility issues.

Is there a way of installing it in the same partition as hardy is installed while having to choose on boot (like it happens when you update to a different kernel). Or am I forced to install it as a whole different OS in it's own partition?