Installation hangs up

My computer spec is Dell Dimension 2400; 40GB IDE ; 256MB,333MHZ DDR Memory.

I have been trying to install Version 6.06LTS DVD which I got with the book 'Moving to Ubuntu Linux,' by Marcel Gagne.

I clicked on the installation icon then entered language at the language menu, clicked on forward, then the world map appears where you enter your location, but the system just hangs at this point. The only way to get out of it is to switch off the power at the mains.

I've tried two different hard disks but get the same problem.

Is 256MB too little memory?

By the way I ran a check disk for errors and the disk was ok.

install hangs up

sorry for the multiple entries, i am new to forums. Try this: do not click on the map, select city from drop down list, then do not attempt to set time, press forward.