Migrate 7 Namespace to C8

[suneel_pgv]

  HI,

I have some questions Please guide me ....

1. How do we migrate away from a series 7 namespace into a standard LDAP authentication model? Are there any pitfalls, ways to migrate users, roles, classes, etc?
   2. What are the newer aspects of security in Cognos 8, specifically system-level security?
   3. Can we take a look at the system installation and perhaps identify some areas for performance and other improvements based on best-practices or other materials.
   4. Are there any best-practice/guidelines for using IBM WebSphere?

Thanks for your help
PGV