What you mean with samples ? Game roms ?
Just put your roms in ,zip form inside /share/roms/mame not inside the bios.
Now, for games with no .chd files, this will be everything. If you have games with .chd file,
you must create inside /share/roms/mame a folder with the exact name of the game,
as example if the game is area51mx.zip, the folder name will be [area51mx] and the file inside
this folder will be area51mx.chd.