Yes GetASFStream is not very friendly.
Until you become acquainted with the more advanced features...just paste the URL obtained from URL Snooper... do not check URL manually... do not check MMS protocol... click on EXEC. Download should start.
If download is interrupted... click YES on resulting box. Download should resume from the point it was interrupted.
GetASFStream has the ability to download .asf .wmv .rm .mov files and more.
To avoid a lot of the cutting and pasting you may even wish to run it from URL Snooper.