Right-click the .part1.rar file and use a program like WinRAR to extract the contents.
Locate the setup.exe inside the extracted folder. House Party -- fitgirl-repacks.site --.part1.rar
Run the setup.exe and follow the on-screen instructions. Right-click the
fitgirl-repacks.site (Only use this official site to avoid scams). House Party -- fitgirl-repacks.site --.part1.rar