Terowe,
If you have PPT 2002/2003 you can add several masters and apply them to the
needed slides accordingly.
Go to View - Master - Slide master - on the toolbar click on the first
button "add master", change whatever you want. Give it a good recognizable
name using the button 'name master', and exit the master. Now select your
slides (thumbnails) and in the slide design taskpane click on the listarrow
next to the master of your choice in the used in this presentation section,
choose apply to selected slides. If you hover over the thumbnails the name
of the master will pop-up helping you identify the right one.