Like I said, you're quite smart sometimes 
So can you tell me how to get images out of a pps file?
Go to where the pps file is located on your pc, right click on it, and select 'New'
That opens it as a PowerPoint presentation, then you simply click on the thumbnail on the left, or scroll to it, and right click the image you wish to save
Select 'Save as picture....' and put it where you want it to go
Then you can just select it like any other image on your pc
