diff --git a/4grab.py b/4grab.py
old mode 100644
new mode 100755
index 4de6526..7863854
--- a/4grab.py
+++ b/4grab.py
@@ -1,7 +1,9 @@
+#!/bin/env python
 import optparse
 import sys
 
 import config
+import download
 
 parser = optparse.OptionParser()
 
@@ -14,4 +16,12 @@ if options.confval:
         print "%s: error: %s is not a valid configuration option" % (sys.argv[0], options.confval[0])
         exit(1)
     print "Setting", options.confval[0], "to", options.confval[1]
-    config.Configuration().
+    config.Configuration().set_option(options.confval[0], options.confval[1])
+    config.Configuration().save()
+    exit(0)
+
+base_url = "http://boards.4chan.org/%s/" % (config.Configuration().get_category())
+
+t = download.get_thread_links(base_url)
+t = download.get_image_links(base_url, t)
+download.get_images(t)
diff --git a/config.py b/config.py
index 06cf0dc..7f448b8 100644
--- a/config.py
+++ b/config.py
@@ -40,11 +40,25 @@ class _Configuration(object):
         self.configparser.set("settings", "category", value)
 
     def option_exists(self, option):
-        for section in self.configparser.sections():
+        sections = self.configparser.sections()
+        for section in sections:
             if self.configparser.has_option(section, option):
                 return True
         return False
 
+    def set_option(self, option, value):
+        sec = None
+        sections = self.configparser.sections()
+        for section in sections:
+            if self.configparser.has_option(section, option):
+                sec = section
+        
+        if not sec is None:
+            self.configparser.set(sec, option, value)
+            return True
+        else:
+            return False
+
     def save(self):
         dirname = os.path.dirname(self.filename)
         if not os.path.exists(dirname):
diff --git a/download.py b/download.py
index 003e718..7ab1a43 100644
--- a/download.py
+++ b/download.py
@@ -19,7 +19,7 @@ def get_thread_links(baseurl):
     for pagenum in t:
         progress.show_progress(i)
 
-        url = base_url + pagenum
+        url = baseurl + pagenum
         tries = 10
         while tries > 0:
             try:
@@ -49,7 +49,7 @@ def get_image_links(baseurl, t = []):
     for link in t:
         progress.show_progress(i)
 
-        img_url = base_url + link
+        img_url = baseurl + link
         tries = 10
         while tries > 0:
             try: