Hi Kati830728 ,
When you click on the link provided, it will take you to the specific webpage which will allow you to download the file (in the case of the 2nd link: http://rapidshare.de/files/11924214/agassibio2.mpg)
When that page opens, scroll down and click on the "FREE" button. This will take you to the next page which says "download ticket reserved" and a 60 second countdown will begin... wait unitl this countdown ends.
Then the page will show a list of items available for download (normally I just leave this alone) and also a colored three digit/letter code which you have to type into the box right next to it.
When you have entered the code, click on the button marked "Download From Net-Mirror 'Omega'".
A download window will open and you can choose whether to open or save the file. I would suggest you choose "save". Your download should begin shortly.
I hope this helps!