Here's a list of everything currently customizable through the IEAK4:
Active Setup wizard bitmap and title bar
Up to 10 custom components can be added and their title for Active Setup can be customized (when Active Setup indicates "Installing..." the custom components title default is "Custom Components")
Up to 10 Installation Options and what is included in each (Minimal, Standard, Full, Custom, etc.)
Up to 10 Download Sites for downloading built package
Browser window title
Animated/static bitmaps
Start Page
Online Support Page
Favorites and Links (formerly known as 5 pre-defined Quick Links, there is now an unlimited number of Links)
Search pane
Custom browser welcome message/option to turn IE4 desktop welcome off
Active Desktop Components
Folder webviews
Custom User Agent String (appended to default only)
LDAP server settings
Outlook Express customizations
Corporate Administrators can also customize:
Installation directory of IE
Option of including Active Desktop
Option for a Silent Install
Complete customization of Active Desktop (components and desktop toolbars)
System Policies and Restrictions
Proxy settings
Auto-config, auto-proxy, and per user .INS files
Timed auto-config
Security Zones
Authenticode settings
Site Certificates and they have the ability to add a new root certificate
Content Ratings
Mail/News server settings
Automatic mail and news signatures
ISPs can also customize:
Internet Connection Manager profile can be imported
Add one channel and delete any competitors
Signup servers/serverless scripts
Proxy settings
Mail/News server settings
Media Status:
Downloadable, multiple floppy packages working
Single floppy working on systems with Dial-Up Networking installed (but not on Win95).