diff --git a/dirutil.py b/dirutil.py
index 585cca5..cd712f3 100644
--- a/dirutil.py
+++ b/dirutil.py
@@ -15,6 +15,10 @@ def resolve_path(w, y=None):
     name = resolve_name(w)
     path = os.path.join(w.buffer.path, name)
     return path
+def resolve_name_path(w, y=None):
+    name = resolve_name(w)
+    path = os.path.join(w.buffer.path, name)
+    return name, path
 
 def find_name(w, s):
     found = False
diff --git a/method/shell.py b/method/shell.py
index 8059fc3..fd3f935 100644
--- a/method/shell.py
+++ b/method/shell.py
@@ -1,21 +1,22 @@
-import os, commands, re, tempfile
+import os
 from subprocess import Popen, PIPE, STDOUT
 
-import buffer, default, dirutil, regex, term, util, window
-from point import Point
-
-from method import Method, Argument
+import dirutil
+import regex
+from buffer.emul import XTermBuffer
+from method import Method, arg
+from term import XTerm
+from window import Window
 
 class Exec(Method):
     '''Execute a command in a shell and put the output in a new buffer'''
     show_success = True
-    args = [Argument('cmd', prompt="Exec: ", datatype='shell')]
+    args = [arg('cmd', dt='shell', p="Exec: ")]
     def _doit(self, w, path, cmd, cmdname=None, bufname=None, cmddir=None, opts={}):
-        if cmddir:
-            cmd = "cd %r && %s" % (cmddir, cmd)
+        if cmddir: cmd = "cd %r && %s" % (cmddir, cmd)
         d = dict(opts)
-        if path:
-            d['path'] = path
+        if path: d['path'] = path
+
         try:
             cmd = cmd % d
         except:
@@ -46,8 +47,7 @@ class Exec(Method):
         
     def _execute(self, w, **vargs):
         if w.buffer.btype == 'dir':
-            name = dirutil.resolve_name(w)
-            path = dirutil.resolve_path(w)
+            name, path = dirutil.resolve_name_path(w)
             self._doit(w, path, vargs['cmd'])
             dirutil.find_name(w, name)
         elif hasattr(w.buffer, 'path'):
@@ -58,7 +58,7 @@ class Exec(Method):
 
 class Man(Exec):
     '''Execute a command in a shell and put the output in a new buffer'''
-    args = [Argument('name', prompt="Program: ")]
+    args = [arg('name', p="Program: ")]
     def _execute(self, w, **vargs):
         name   = vargs['name']
         cmd    = 'man %r' % name
@@ -76,15 +76,15 @@ class Man(Exec):
             err    = False
             errmsg = "man: ok"
         if output:
-            xterm = term.XTerm(cbuf=True)
-            output = xterm.term_filter(output)
-            switch_to = err or self.show_success
-            w.application.color_data_buffer('*Manpage*', output, switch_to=switch_to)
+            xterm  = XTerm(cbuf=True)
+            s      = xterm.term_filter(output)
+            switch = err or self.show_success
+            w.application.color_data_buffer('*Manpage*', s, switch_to=switch)
         w.set_error(errmsg)
 
 class Pipe(Method):
     '''Pipe the buffer's contents through the command, and display the output in a new buffer'''
-    args = [Argument('cmd', datatype="shell", prompt="Pipe: ")]
+    args = [arg('cmd', dt="shell", p="Pipe: ")]
     def _parse(self, w, **vargs):
         # return 3 things: prog name, cmd, and whether to use the shell
         m = regex.shell_command.match(vargs['cmd'])
@@ -126,30 +126,27 @@ class Pipe(Method):
 
 class Grep(Pipe):
     '''Grep the buffer's contents for instances of a pattern, and display them in a new buffer'''
-    args = [Argument('pattern', datatype="str", prompt="Pattern: ")]
+    args = [arg('pattern', dt="str", p="Pattern: ")]
     def _parse(self, w, **vargs):
         return ('grep', ('grep', '-E', '-n', vargs['pattern']), False)
 class Sed(Pipe):
     '''Push the buffer's contents through a sed expression'''
-    args = [Argument('expression', datatype="str", prompt="Expression: ")]
+    args = [arg('expression', dt="str", p="Expression: ")]
     def _parse(self, w, **vargs):
         return ('grep', ('sed', '-r', '-e', vargs['expression']), False)
 
 class Interact(Method):
     '''Interact with a program via a PTY'''
-    args = [Argument('bname', datatype="str", prompt="Buffer Name: ",
-                     default=default.build_constant('*Interact*')),
-            Argument('cmd', datatype="shell", prompt="Command: ",
-                     default=default.build_constant('bash'))]
+    args = [arg('bname', dt="str", p="Buffer Name: ", dv=lambda w: '*Interact*'),
+            arg('cmd', dt="shell", p="Command: ", dv=lambda w: 'bash')]
     modename = None
     def _execute(self, w, **vargs):
         bname = vargs['bname']
         cmd   = vargs['cmd']
         a = w.application
         a.close_buffer_by_name(bname)
-        b = buffer.emul.XTermBuffer(a, 'bash', ['-c', cmd], name=bname,
-                                    modename=self.modename)
+        b = XTermBuffer(a, 'bash', ['-c', cmd], name=bname, modename=self.modename)
         a.add_buffer(b)
-        window.Window(b, a)
+        Window(b, a)
         if a.window().buffer is not b:
             a.switch_buffer(b)