It is often a dump of the last official Nokia firmware (Firmware v35.0.002 or similar).
After the installation is complete, your Nokia N95 virtual device is ready. You can now begin installing .SIS or .SISX files to fill it with classic games and applications.
Before diving into ROMs, it's essential to understand the engine that makes this all possible. EKA2L1 is a cross-platform Symbian OS emulator, written primarily in C++. In development for several years, it has matured into the best way to run legacy Symbian applications and games on modern hardware. The emulator is designed to simulate different Symbian platforms, including S60v1, S60v3, and S60v5, which power many classic Nokia devices like the 7650, E50, and of course, the N95.