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                       A+ Download  - January 9, 2009
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   Download Methods
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   There are 2 methods of downloading the digital files.
   
   Method 1
   --------
   On the return page to your web site the customer is able to download
   the files immediately.  The HTML page is called thankyou_web.htm and
   the XML tag which captures the links for download is called:  
   
                  <QR $downloadlink>.
   
   If you do not want the customer to use this method then simply remove this
   tag.
   
   Method 2
   --------
   The customer receives an e-mail with a link to a login page to access the download
   links.   On the login page the customer will be required to enter the PayPal
   transaction id found on their PayPal receipt and their PayPal e-mail address.
   This will verify the identity of the customer and their transaction.
   
   To disable this method set the parameter  SendDownloadLink to 0 under 
   Edit PayPal Parameters from the Admin Web Panel.
   
   There is also an expiry time set to the link sent in the e-mail. 
   The time limit is set by the parameter restrictuniqueidbytime under 
   Edit PayPal Parameters from the Admin Web Panel. 
 
   Method 3
   --------
   Method 3 is essentially the same as method 2 except it allows the administrator to
   send the customer an e-mail with the download link to obtain their files from 
   the transaction.  This method is useful in the event that the customer had trouble 
   downloading their files.  Its accessed from the Transaction Report Listing.
   
   
   Access Restrictions
   ===================
   There are 3 access restriction methods to discuss.
   
   Method 1
   --------
   The number of download attempts can be limited.  This is controlled by the parameter
    MaximumAttempts under Edit PayPal Parameters from the Admin Web Panel.  
   The default is set to 3.
   
   Method 2
   --------
   The time allowed to download the file can also be restricted.  This is set by the parameter
    restrictbytime under Edit PayPal Parameters from the Admin Web Panel.  If it is set to 0
   there is no time limit.  It can also work in conjunction with the restriction to the number
   of download attempts set by the parameter  MaximumAttempts.  
   The default is set to 180 minutes.
   
   Method 3
   --------
   A customer's access can be further restricted by their IP Address, the Computer and Browser 
   footprint.  These are set by the 2 parameters restrictbyip and restrictbyuseragent.
   under Edit PayPal Parameters from the Admin Web Panel.  
   
   This will prevent the customer from sharing their download links with others.
   There is also the option to reset the IP, Computer and Browser footprint from the 
   Transaction Report Listing in the event the customer needs to download the file but from
   a different IP Address, Computer and/or Browser.
   
   The default of these are both set to 0 that is they are turned off.