Bino
You can download the latest Windows Media Player for Mac OSX here:
Windows Media Player (free)
Go down the page until you get the "Windows Media Player 9 for Mac OS X" (it's a .sitx file so you'll need Stuffit Expander - see below).
With some software installations, as opposed to trying to open the installer from the disc, all you have to do is drag the icon into the applications folder and it will do it all for you.
Whilst I think about it, there is another little glitch in the system that you may or may not come across. For some it never rears it's ugly head - depends if you're using Panther or Tiger, but just in case it does.......
For some reason the Times RO font will prevent you from downloading/installing/updating. Your Mac doesn't need it and unless you do particularly, you can safely disable/remove it. First, double click your hard disc icon and under 'Applications', double click 'Font Book'. In the left hand column, click 'All Fonts' and then use the slider of the right hand column to go down until you get to 'Times' (note: don't look in the Times CY or Times New Roman fonts). Click the little arrow to the left to expand the file and then click on one of the fonts i.e. 'Regular'. Then, under 'Preview' (on the top bar) click 'Show font info'. Move the cursor back down over the Times fonts (Regular/Italic/Bold etc.) and after a second or so a yellow box should appear giving you the font details. Look for the ones that have 'Times RO' at the end of the Path line. All the ones that have, you can either disable (under 'Edit') or remove entirely (under 'File'). Once done, quit out and restart your Mac. Should be trouble free updating and installing.
Sorry if this has been a bit long winded - trying to keep it in human speak!
Trips
Oh forgot to say, AppleMacster is spot on the money with Stuffit Expander. Download your free copy from the link he\'s given. Then, when you double click the .sit or .sitx file, Stuffit should automatically open and when you select it to expand it'll put a copy of the file on your Desktop. And no, ordinarily there shouldn't be a space between OSX and .sit. If you need to remove it, drag the .sit file onto your Desktop and then change it from there.
Trips