: Free, open-source, and handles almost every format. WinRAR : The native tool for .rar files.
Once extracted, look for a README.txt or install.nfo file. These usually contain the specific "guide" or instructions intended by the file's creator. IM2.rar
To give you a solid guide, I need a little more context on what contains. This specific filename is often associated with a few different things depending on where you found it. Commonly, an .rar file with this name refers to: : Free, open-source, and handles almost every format
: Specifically for Iron Man 2 (the video game) or related character mods for games like GTA V . IM2.rar