diff --git a/README.md b/README.md
index b7c3df1..1da9600 100644
--- a/README.md
+++ b/README.md
@@ -58,23 +58,51 @@ Clone the repo to your machine:
 git clone https://github.com/jimeh/tmuxifier.git ~/.tmuxifier
 ```
 
-### bash & zsh
+Then add `~/.tmuxifier/bin` to your PATH to make the `tmuxifier` executable
+available to you:
+
+__In bash & zsh:__
+
+```bash
+export PATH="~/.tmuxifier/bin:$PATH"
+```
+
+__In tcsh:__
+
+```tcsh
+set path = ( "~/.tmuxifier/bin" $path )
+```
+
+### Custom Installation Path
+
+To install Tmuxifier somewhere else than the suggested `~/.tmuxifier`, simply
+clone the repository to your custom location, and ensure the `bin` folder is
+added to your PATH making the `tmuxifier` executable available to you.
+
+## Setup
+
+__In bash & zsh:__
 
 And add the following to your `~/.profile`, `~/.bash_profile`, `~/.zshrc` or
 equivalent:
 
 ```bash
-[[ -s "$HOME/.tmuxifier/init.sh" ]] && source "$HOME/.tmuxifier/init.sh"
+eval "$(tmuxifier init -)"
 ```
 
-### tcsh
+__In tcsh:__
 
 Add the following to your `~/.cshrc`, `~/.tcshrc` or equivalent:
 
 ```tcsh
-if ( -s "$HOME/.tmuxifier/init.sh" ) then
-  source "$HOME/.tmuxifier/init.sh"
-endif
+eval `tmuxifier init -`
+```
+
+## Updating
+
+```bash
+cd ~/.tmuxifier
+git pull
 ```
 
 ## Usage
@@ -129,17 +157,6 @@ in it.
 
 ## Configure & Customize
 
-### Custom Installaton Path
-
-To install Tmuxifier to a custom path, clone the repository to your desired
-path and set `$TMUXIFIER` to that path, additionally loading `init.sh` or
-`init.tcsh` from that same path.
-
-```bash
-export TMUXIFIER="$HOME/.dotfiles/tmuxifier"
-[[ -s "$TMUXIFIER/init.sh" ]] && source "$TMUXIFIER/init.sh"
-```
-
 ### Custom Layouts Path
 
 You can customize the layouts directory used by Tmuxifier by setting
diff --git a/bin/tmuxifier b/bin/tmuxifier
index 0b19df5..ab482fc 100755
--- a/bin/tmuxifier
+++ b/bin/tmuxifier
@@ -2,8 +2,26 @@
 set -e
 [ -n "$TMUXIFIER_DEBUG" ] && set -x
 
+resolve_link() {
+  $(type -p greadlink readlink | head -1) $1
+}
+
+abs_dirname() {
+  local cwd="$(pwd)"
+  local path="$1"
+
+  while [ -n "$path" ]; do
+    cd "${path%/*}"
+    local name="${path##*/}"
+    path="$(resolve_link "$name" || true)"
+  done
+
+  pwd
+  cd "$cwd"
+}
+
 if [ -z "${TMUXIFIER}" ]; then
-  export TMUXIFIER="${HOME}/.tmuxifier"
+  export TMUXIFIER="$(dirname "$(abs_dirname "$0")")"
 else
   export TMUXIFIER="${TMUXIFIER%/}"
 fi
diff --git a/init.sh b/init.sh
index 541a2d9..059fec5 100644
--- a/init.sh
+++ b/init.sh
@@ -1,4 +1,4 @@
-# Set tmuxifier root path.
+# Set/fix Tmuxifier root path if needed.
 if [ -z "${TMUXIFIER}" ]; then
   export TMUXIFIER="${HOME}/.tmuxifier"
 else
@@ -6,10 +6,12 @@ else
 fi
 
 # Add `bin` directroy to `$PATH`.
-export PATH="$TMUXIFIER/bin:$PATH"
+if [[ ":$PATH:" != *":$TMUXIFIER/bin:"* ]]; then
+  export PATH="$TMUXIFIER/bin:$PATH"
+fi
 
 # If `tmuxifier` is available, and `$TMUXIFIER_NO_COMPLETE` is not set, then
-# load tmuxifier shell completion.
+# load Tmuxifier shell completion.
 if [ -n "$(command -v "tmuxifier")" ] && [ -z "$TMUXIFIER_NO_COMPLETE" ]; then
   if [ -n "$BASH_VERSION" ]; then
     source "$TMUXIFIER/completion/tmuxifier.bash"
diff --git a/init.tcsh b/init.tcsh
index a681394..0a20c0b 100644
--- a/init.tcsh
+++ b/init.tcsh
@@ -1,13 +1,15 @@
-# Set tmuxifier root path.
+# Set Tmuxifier root path if needed.
 if ( ! $?TMUXIFIER ) then
   setenv TMUXIFIER "${HOME}/.tmuxifier"
 endif
 
-# Add `bin` directroy to `$PATH`.
-set path = ( $TMUXIFIER/bin $path )
+# Add `bin` directroy to `$path` if needed.
+if ( ! (" $path " =~ "* $TMUXIFIER/bin *" ) ) then
+  set path = ( $TMUXIFIER/bin $path )
+endif
 
 # If `tmuxifier` is available, and `$TMUXIFIER_NO_COMPLETE` is not set, then
-# load tmuxifier shell completion.
+# load Tmuxifier shell completion.
 if ( ! $?TMUXIFIER_NO_COMPLETE ) then
   which tmuxifier > /dev/null && source "$TMUXIFIER/completion/tmuxifier.tcsh"
 endif
diff --git a/libexec/tmuxifier-init b/libexec/tmuxifier-init
new file mode 100755
index 0000000..a467bea
--- /dev/null
+++ b/libexec/tmuxifier-init
@@ -0,0 +1,74 @@
+#! /usr/bin/env bash
+set -e
+[ -n "$TMUXIFIER_DEBUG" ] && set -x
+
+# Set shell to first argument that is not "-", "-h" or "--help".
+for arg in "$@"; do
+  if [ "$arg" != "-" ] &&[ "$arg" != "-h" ] && [ "$arg" != "--help" ]; then
+    shell="$arg"
+  fi
+done
+
+if [ -z "$shell" ]; then
+  shell="$(basename "$SHELL")"
+fi
+
+case "$shell" in
+  bash )
+    profile='~/.bash_profile'
+    ;;
+  zsh )
+    profile='~/.zshrc'
+    ;;
+  ksh )
+    profile='~/.profile'
+    ;;
+  csh )
+    profile='~/.cshrc'
+    ;;
+  tcsh )
+    profile='~/.tcshrc'
+    ;;
+  * )
+    profile='shell init file'
+    ;;
+esac
+
+# Provide tmuxifier help
+if [[ " $@ " == *" --help "* ]]; then
+  echo "usage: tmuxifier init -
+
+Load Tmuxifier by adding the following to your ${profile}:
+"
+
+  case "$shell" in
+    csh | tcsh )
+      echo "    eval \`tmuxifier init -\`
+"
+      ;;
+    * )
+      echo "    eval \"\$(tmuxifier init -)\"
+"
+      ;;
+  esac
+
+  echo "You might also need to add Tmuxifier's bin directory to your PATH."
+  exit
+fi
+
+# Print help if "-" argument is not given
+if [[ " $@ " != *" - "* ]]; then
+  echo "$(tmuxifier-help init $@)" >&2
+  exit 1
+fi
+
+case "$shell" in
+  csh | tcsh )
+    echo "setenv TMUXIFIER \"$TMUXIFIER\";"
+    echo "source \"\$TMUXIFIER/init.tcsh\";"
+    ;;
+  * )
+    echo "export TMUXIFIER=\"$TMUXIFIER\";"
+    echo "source \"\$TMUXIFIER/init.sh\";"
+    ;;
+esac