It is the first part of a multi-volume 7-Zip archive containing the core files for the VP Modpack .
If you only have VP1.7z , you generally cannot extract the full mod. You must have all numbered volumes in the same folder before starting the extraction from the first file.
The 7z format is an open-architecture archive known for high compression ratios using the LZMA/LZMA2 algorithms. Common Issues & Tips
Users download this file along with subsequent parts (e.g., VP2.7z, VP3.7z) to install a comprehensive overhaul of the game that includes new aircraft, maps, and graphical effects.
