This page allows you to extract any v1 UMOD straight in your browser without having to download anything or send any file over the internet.
Be very careful with the manifest files, you can mess up game up pretty bad if you replace the ones in you System folder !
Some big UMODs may not be decompressed properly due to a variable-length field.
A fix is being worked on and the decompressor should detect this problem and warn you.
You need to select and process a file first.