You don't need a loopback if you want to similate the TSHOOT web and FTP servers.
You can either:
1. Use the GNS3 routers as servers (you don't have to enable HTTP) where PING is the only thing you can use to test connectivity, or
2. Use Virtualbox with two virtual machines, each acting as a web and FTP server respectively, or
3. Download and watch the videos I uploaded yesterday to YouTube about all the TSHOOT tickets expected in the CCNP TSHOOT exam. No need to simulate FTP nor HTTP as the exam is only about reachability.
Check out the link below:
http://www.youtube.com/playlist?list=PL ... p_3uMDjjqB