Coul'd you please advice how can i switch from one snippet scheme to another. For example i have ruby for *.rb, but sometimes i want to use rails snippets... per rails.vim i can always know is it good time to switch to rails snippets but i don't know how to do it.
antono: You've got a few options. First you could set your filetype to 'rails' which will cause the snippets to be loaded. You could also set it to 'ruby,rails' which would cause both to be loaded (check that; I'm not sure if it's comma delimited)
The other option is to select rails from the Snippets menu (if using gvim) or to use 'emenu' and do the equivalent if using the console version.