Help with map install.

I am trying to install some more maps (tomtom 5, hx4700)
when I put the original cd in my pc all I get is :-

Not enough free space on tempory folder
cannot run setup

No options to do anything else. now it was installed originally from
this pc so whats changed and how do I correct it ??

Help line came to the rescue.
Had to open the windows tempory files and delete a tomtom setup file.
if it happens to anyone else, open the run comand from the start menu,
type "%temp%
that should open the tem dir.
then delete the file.