diff --git a/presentation/lookAndFeel/knowledgeTree/documentmanagement/downloadBL.php b/presentation/lookAndFeel/knowledgeTree/documentmanagement/downloadBL.php
new file mode 100644
index 0000000..9e39088
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+++ b/presentation/lookAndFeel/knowledgeTree/documentmanagement/downloadBL.php
@@ -0,0 +1,74 @@
+<?php
+/**
+ * $Id$
+ *
+ * Contains the business logic required to download a document.
+ *
+ * Expected form varaibles:
+ *   o $fDocumentID - Primary key of document to view
+ *
+ * Licensed under the GNU GPL. For full terms see the file DOCS/COPYING.
+ *
+ * @author Michael Joseph <michael@jamwarehouse.com>, Jam Warehouse (Pty) Ltd, South Africa
+ * @package presentation.lookAndFeel.knowledgeTree.documentmanagement
+ */
+
+require_once("../../../../config/dmsDefaults.php");
+
+require_once("$default->fileSystemRoot/lib/security/permission.inc");
+require_once("$default->fileSystemRoot/lib/documentmanagement/PhysicalDocumentManager.inc");
+require_once("$default->fileSystemRoot/lib/documentmanagement/DocumentTransaction.inc");
+require_once("$default->fileSystemRoot/lib/documentmanagement/Document.inc");
+require_once("$default->fileSystemRoot/lib/visualpatterns/PatternCustom.inc");
+
+if (checkSession()) {
+    if (isset($fDocumentID)) {
+    	$oDocument = Document::get($fDocumentID);
+    	if (Permission::userHasDocumentReadPermission($fDocumentID)) {
+	        if (isset($fForInlineView)) {
+				$oDocumentTransaction = & new DocumentTransaction($fDocumentID, "Inline view", VIEW);
+	            $oDocumentTransaction->create();
+	            PhysicalDocumentManager::inlineViewPhysicalDocument($fDocumentID);			
+			} else {
+	            //if the user has document read permission, perform the download
+	            if (isset($fVersion)) {
+	                // we're downloading an old version of the document
+	                $oDocumentTransaction = & new DocumentTransaction($fDocumentID, "Document version $fVersion downloaded", DOWNLOAD);
+	                $oDocumentTransaction->create();
+	                
+		        	// if the document is currently checked out, and we're the version we're downloading
+		        	// is the same as the current version, then download the current version of the document	                
+	                if ($oDocument->getIsCheckedOut() && ($fVersion == $oDocument->getVersion())) {
+						PhysicalDocumentManager::downloadPhysicalDocument($fDocumentID);	                	
+	                } else {
+	                	PhysicalDocumentManager::downloadVersionedPhysicalDocument($fDocumentID, $fVersion);
+	                }
+	            } else {
+	                // download the current version
+	                $oDocumentTransaction = & new DocumentTransaction($fDocumentID, "Document downloaded", DOWNLOAD);
+	                $oDocumentTransaction->create();
+	                PhysicalDocumentManager::downloadPhysicalDocument($fDocumentID);
+	            }
+	        }
+    	} else {
+	        require_once("$default->fileSystemRoot/presentation/webpageTemplate.inc");
+	        $oPatternCustom = new PatternCustom();    		
+        	if ($oDocument) {
+            	$oPatternCustom->setHtml("<a href=\"" . generateControllerLink("browse", "fFolderID=" . $oDocument->getFolderID()) . "\"><img src=\"$default->graphicsUrl/widgets/back.gif\" border=\"0\" /></a>\n");
+        	} else {
+        		$oPatternCustom->setHtml("<a href=\"javascript:history.go(-1)\"><img src=\"$default->graphicsUrl/widgets/back.gif\" border=\"0\" /></a>\n");
+        	}
+            $main->setErrorMessage("Either you do not have permission to view this document, or the document you have chosen no longer exists on the file system.");
+            $main->setCentralPayload($oPatternCustom);            
+			$main->render();
+    	}
+    } else {
+        require_once("$default->fileSystemRoot/presentation/webpageTemplate.inc");
+        $oPatternCustom = new PatternCustom();
+        $oPatternCustom->setHtml("<a href=\"javascript:history.go(-1)\"><img src=\"$default->graphicsUrl/widgets/back.gif\" border=\"0\" /></a>\n");
+        $main->setErrorMessage("You have not chosen a document to view");
+        $main->setCentralPayload($oPatternCustom);            
+		$main->render();
+    }
+}         
+?>
\ No newline at end of file