diff --git a/tren.py b/tren.py
index 9c9a20b..fc861e6 100755
--- a/tren.py
+++ b/tren.py
@@ -8,7 +8,7 @@
 PROGNAME = "tren.py"
 BASENAME = PROGNAME.split(".py")[0]
 PROGENV  = BASENAME.upper()
-RCSID = "$Id: tren.py,v 1.181 2010/03/10 01:02:07 tundra Exp $"
+RCSID = "$Id: tren.py,v 1.182 2010/03/10 18:29:25 tundra Exp $"
 VERSION = RCSID.split()[2]
 
 # Copyright Information
@@ -269,8 +269,9 @@
 eNOROOTRENAME =  "Cannot rename root of file tree!"
 eNULLARG      =  "%s cannot be empty!"
 eRENAMEFAIL   =  "Attempt to rename '%s' to '%s' failed : %s!"
+eTOKBADSEQ    =  "Unknown sequence renaming token, '%s'!"
 eTOKDELIM     =  "Renaming token '%s' missing delimiter!"
-eTOKUNKNOWN   =  "Renaming Token '%s' is unknown type!"
+eTOKUNKNOWN   =  "Renaming token '%s' is unknown type!"
 eTOOMANYINC   =  "Too many includes! (Max is %d) Possible circular reference?" % MAXINCLUDES
 
 
@@ -951,8 +952,35 @@
                     
             elif r[2] != "" and (r[2][0] == TOKASCEND or r[2][0] == TOKDESCEND):
 
-                for token in self.SortViews:
-                    print token
+                # Parse the Sequence Renaming Token into the token itself
+                # and its corresponding formatting field.
+                
+                token = r[2][1:]
+
+                found = False
+                for seqtoken in self.SortViews:
+
+                    if token.startswith(seqtoken):
+
+                        token, field = token[:len(seqtoken)], token[len(seqtoken):]
+                        found = True
+                        break
+
+                if not found:
+                    ErrorMsg(eTOKBADSEQ % r[2])
+
+                # Retrieve the ordered list of the requested type,
+                # adjust for descending order, and plug in the
+                # sequence number for the current renaming target
+                # (which is just the index of that filename in the
+                # list).
+
+                orderedlist = self.SortViews[token][:]
+
+                if r[2][0] == TOKDESCEND:
+                    orderedlist.reverse()
+
+                r[2] = str(orderedlist.index(target))
                     
             ###
             # Unrecognized Renaming Token