Hi guys,
I just installed a plugin (script) at my MacVim -> MacVim.app/Contents/Resources etc. and the plug is installed! However when I load other files with vim which came with the MacOSX (by default) the plugin is not installed ... since I did not installed in that directory! PLEASE let me know how I can find the directory of the default vim in MacOSX 
I am having some hard times... to figure out it!
I take it you are launching vim from the Terminal. This would be launching the /usr/bin/vim executable not macvim.
Please copy the plugin into your local user inside ".vim/plugin" (there is a dot before vim). Now see if it loads.
You might also be interested in pathogen.vim if you use several plugins and wish to keep them updated easily.
pubxx-xxx:~ xxx$ cd ~/.vim
-bash: cd: /Users/xxx/.vim: No such file or directory
pubxx-xxx:~ xxx$
I cannot open this directory in MacOSX since morning
please create such a directory.
cd
mkdir .vim