I have imported users from the active directory using "Mange Profile
Database" under "User Profile, Audiences, and Personal Sites" in Site
Settings.
Is there a way that all these users get into "Manage Users" listing
under "General Settings" and have Reader role assigned instead of
manually typing in each user and assigning them the profile.
OR
If they cannot be added into "Manage Users" listing then have thir role
default to "Reader" profile after import from Active Directory.