diff --git a/openmmm.py b/openmmm.py
index fedf1c2..76bc82c 100755
--- a/openmmm.py
+++ b/openmmm.py
@@ -5,6 +5,9 @@
 import shutil
 import re
 import argparse
+from distutils.util import strtobool
+import fileinput
+import fnmatch
 
 parser = argparse.ArgumentParser(description='Manage openMW mods')
 parser.add_argument("-a", help="Mod to add",)
@@ -28,21 +31,60 @@ def list_mods():
         if bool(re.findall("data=", i)) == True:
             print(i)
 
+def prompt_bool(question):
+    sys.stdout.write('%s [y/n]: ' % question)
+    while True:
+        try:
+            return strtobool(input().lower())
+        except ValueError:
+            sys.stdout.write('Please respond with \'y\' or \'n\'.\n')
+
 def install_mod(name, reinstall=False):
     mod_name = name
     # This is the dir your mods will be stored in
     mod_dir_copy_path = home + '/MWmods/' + mod_name
     data_string = 'data="{0}{1}"'.format(mod_dir, mod_name)
+
+    # Check if mod is already in config (prompt for re-install and new position)
+    clean_config = False
+    config_updated = False
+    with open(openmw_config_file_path, mode='r') as config:
+        if config.read().find(data_string + '\n') != -1:
+            clean_config = prompt_bool('Mod directory "{}" already exists in config file. Replace (possibly changing install order)?'.format(mod_name))
+            config_updated = not clean_config
+
+    for line in fileinput.input(openmw_config_file_path, True, ".bak", 0, "r", None):
+        if line != (data_string+'\n') or (not clean_config):
+            sys.stdout.write(line)
+
+    # Check if mod directory has already been installed
+    if not reinstall and os.path.exists(mod_dir_copy_path):
+        if prompt_bool('Mod Directory "{0}" exists. Replace with new version?'.format(mod_dir_copy_path)):
+            shutil.rmtree(mod_dir_copy_path)
+        else:
+            reinstall = True
+
     os.makedirs(mod_dir, exist_ok=True)
     if reinstall == False:
         print("Copying mod")
         shutil.copytree(mod_name, mod_dir_copy_path)
 
+    # Detect BSAs and add automatically
+    bsa_string = ""
+    for file in os.listdir(mod_dir_copy_path):
+        if fnmatch.fnmatch(file, '*.bsa'):
+            if bsa_string != "":
+                bsa_string += '\n'
+            bsa_string += 'fallback-archive={0}'.format(file)
+
     # We make a back up of the config file
-    shutil.copy(openmw_config_file_path, openmw_config_path + 'openmw.cfg.bak')
-    print("Editing MW config")
-    with open(openmw_config_file_path, mode='a') as config:
-        print(data_string, file=config)
+    if not config_updated:
+        shutil.copy(openmw_config_file_path, openmw_config_path + 'openmw.cfg.bak')
+        print("Editing MW config")
+        with open(openmw_config_file_path, mode='a') as config:
+            print(data_string, file=config)
+            if bsa_string:
+                print(bsa_string, file=config)
 
 
 if args.r: