The Sof.qe4 file you have requested: Tools and Utilities / SDK / Soldier of Fortune SDK *.qe4 - 2.12kb is not available. Perhaps try browsing all files for the game Soldier of Fortune and upload any files you want to share or are missing. This is the only information we could locate:
The file needed, to run SoF Radiant in the first SDK. When asked to load a New Project, open this file.