Using vi edit multiple file:
1. vi -p file1 file2 file3
2. siwth with :tabn and :tabp
3. list all tabs with :tabs or :tabl
4. add new tab with :tabnew fil4

http://www.techrepublic.com/blog/opensource/use-tabs-to-open-multiple-files-
in-vim/678
http://www.cyberciti.biz/faq/vim-editing-multiple-files-with-windows-buffers/