What are .dol files?
.dol files are the wii’s equivalent of .EXE files from windows. They execute specific files that start a game or program. What are .iso files? They’re image files. Exact copies of any original program. What are .elf files? They’re another type of executable file. Used before Homebrew channel was invented. What are IOS files? An IOS file is the operating system that runs on the Starlet co-processor inside the Hollywood package. It provides the services that are used by Wii code to access most of the system devices. IOS is a somewhat unique system in that many games use (and come with) their own version of the IOS, though many games uses the same IOS versions. There is no “true” version of the operating system, instead there are many of what could be called “slots” for different versions of IOS to sit in. IOS versions are not aware of each other, and are not used or invoked at all unless software specifically requests to run using them. In this way it can be considered “safe” to install
