route map with custom url

hi, i have setting this rule on my route.rb:

map.typo '/my_custom_name1/:id/my_custom_name2/:alpha', :namespace =>
'front', :controller => 'locations', :action => 'typo_locations', :alpha
=> { :alpha => :get }

in the view for create link :

link_to( letter, typo_path( obj.id, :alpha => letter ) )

it works, but in my browser i display this URL:

http://localhost:3000/my_custom_name1/10?alpha=A

instead i want to display this:

http://localhost:3000/my_custom_name1/10/my_custom_name2/A

how can obtain the result?

map.typo '/my_custom_name1/:id/my_custom_name2/:alpha', :namespace =>
'front', :controller => 'locations', :action => 'typo_locations', :alpha
=> { :alpha => :get }

i solved with here:

map.typo_alpha_path '/my_custom_name1/:id/my_custom_name2/:alpha',
:namespace =>