Hi Barry, I thought they would be.
.PPS is a Microsoft power point file, and you need the Mac version of Microsoft power point to open it on your system - if you have not got this, have you got a test drive of MS Office on your system?
If so, install this, I think it comes with powerpoint - it will last for 30 days only, but at least you will be able to open the files for now.
If you have not got it, then you can download the test drive from here:
http://www.microsoft.com/mac/default.aspx?pid=office2004td
.WMV files are windows media video files, and you will need either windows media player for mac, or flip for mac which installs the codec in quick time to allow wmv files to be opened.
Download Windows Player Here
OR
Download WMV codecs for Quick Time Here
I hope this helps
