hello all thanks to all 3 of you who have tried to help....there ARE good people left on earth!!! first, presentation is now 30 mb as I was using a WAV file not MP3......all images are 200 kb or less now and have reduced the fast transitions where i can but still have problems running from CD on certain pc's ....all at my clients office of course! have now downloaded the MuiltCD utility as I will be including more than one pres. and it is useful...but having tested it on my lap top it still skips depsite it apparently downloading the pres to a buffer or such like. anyway, i have taken up enough of your time and thanks again for your help. if you find you can't sleep tonight and suddenyl think of a solution for this, do feel free to email me...i'll be here thinking about all those euros i won't now be getting from the client!!! Cheers all. Phill