Requirements
Start by downloading the CoD4 Developer Suite if you haven't, and extract the files into your Call of Duty 4 root directory.
You'll also need an installation of UltraEdit by IDM Computer Solutions, Inc.
Loading The CoD4 Project File
1. Start up UltraEdit
2. Go to 'Project' > 'Open Project / WorkSpace...'
3. Navigate to your Call of Duty 4 bin directory, and subfolder ultraedit
4. Select CoD4.prj
Syntax highlighting will automatically be enabled now whenever you have a GSC script open.
Viewing CoD4 File List
1. In UltraEdit, go to 'View' > 'Views/Lists' > 'File Tree List'
On the left side of UltraEdit you should now see a Project file tree from your root Call of Duty 4 directory with commonly used folders like mods / raw /map_source / fx /soundaliases / zone_source.
Viewing CoD4 Function List
1. In UltraEdit, go to 'View' > 'Views/Lists' > 'Function List'
On the rightside of UltraEdit you should now see a Function List tree. When you have a GSC script open, the list will populate will all functions inside the script. If functions take paramters, those will be listed as drop down items to view.