What components? Process Models, TN, Workflow, Clustered IS, Reverse invokes, Broker, etc?
It would likely be an easier path to upgrade to 6.5 for a while, BUT there are things that 7.1 does much better (such as BPM, RI), and depending on your current implementation, it may make much more sense to go straight to 7.1.
#webMethods#Integration-Server-and-ESB#webMethods-Architecture#webMethods-General