hi vitamin. I now understand your suggestion is how to install, but..... I use UBUNTU 8.04 latest update and Wine 1.1.6 is installed. And so is the Polar ProTrainer 5 SW - from CD. (PTT 5) PTT 5 is working - so and so. It contains a calender and the picture-rendering i overlaping, but this is a minor concirn. My problem is that the buildt in uptateSW do not work, and there is alot of necesery updates since the CD-version. Minor is that none of the links are working - i.e. www.polar.fi is not working when launced from the program. May be the hole issue is that it is separated from the internett ??? The treiningSW gets data by IRDA. A numberfile is transfered from the wristwatch to the SW. This is not working, and it is totally useless without it. I'm still hoping for a solution, and I have very limited knowledge in datamatters.