Get this megapack (includes latest patch) for your UT2004.
it is also needed to view all the demo files properly.You can also check out this page for UT2k4 essential files.
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To watch the demo (replay) files with ease, use any of these tools:These utilities also find and download the missing files (if there any) required to watch the demo you are trying to watch. They also support the widely used .demo4rar/.demo4zip extension which is really convenient.
- MWatch (recommended)
- rK's DemoWatcher