The Nokia N8 runs on the Symbian^3 kernel. To make the emulator work, you generally need a Z: Drive Image. EKA2L1 is smart enough to build this from raw firmware files.
Alternatively, EKA2L1 has improved its support and may accept raw .fpsx or .rofs files directly during setup.
The search term "Nokia N8 rom eka2l1 cracked" is technically incorrect. A ROM (Read-Only Memory) is a firmware dump. It is either genuine or corrupt. There is no DRM on a Nokia N8 firmware file that needs "cracking" in the traditional sense.
So why do people add "cracked" to the search?
Downloading executable files, firmware images, or emulator packages from unknown sources (especially those promising "cracked" content) is a high-risk activity.