The location of the downloaded file is dictated by your Internet browser.  An easy way to find out where files are going is to open the same browser you used to download your soundloop file.  Find a link for some file to download (perhaps you can go back to the download for the soundloop and download it again).  Right-click and choose whatever option (browser dependant) that means save the file to your hard disk.

For example, in Internet Explorer, right-click and choose "Save target as"

This will open up your download dialogue box and you should be able to figure out where on your hard drive your files are being saved.

Once you have the file, simply move it to your defined folder within Music Maker.  You can find this out by doing the following:

Within Music Maker, click the "Soundpools" tab

Right-click on any sound pool file in the "Name" box

Click "Properties"

You will see your Soundpool "Location" in the Properties windows.  Put your new file in the "Soundpools" folder identified in that Properties box.

Hope this helps.