gistfile1.rbx

module Slicehost
 # the 4 methods (may add a few more)
 # that are required for an extra base
 def instances_list
  ...
 end

 register_remote_base :slicehost
end

# Then, in your pool

pool :php_application do
 using :slicehost
 
 cloud :app do
  ...
 end
end