Power users, for example can save anywhere on the local computer. This is more a question of how the machine has been configured, not related to profiles. We are working on a global log on script for all users this will help in mapping to different groups. Some groups have their own servers that provide disk space for their students their log on script would be set up on their server. The question really is do we want to do per-building proxy servers to save IE caching disk space.
Short answer is no.
Yes on a per-user basis. Other machines will still get the roaming profile. In CCTR, the users are responsible for their own files. No access will be affected. Through Active Directory by creating a container in which the organization can create, add or delete their own groups.