2 questions about WALKMAN NWZ-B135F

[Kloppstock]

Im not sure 'WALKMAN NWZ-B135F 2 Gb Black' is generation 4 or not? but i have now decided it is

two question i have

1:
I have just buyed my unit here, and the first thing i noticed whas that "Equalizer" inside "music settings" is unaxessable, im getting this message

"CANNOT EXECUTE"

its hard to think that this submodel doesnt support the EQ when the menu is infact coded into the player

2:
How do i create playlists for this player?
my overal goal is to have all synth songs inside one folder
to acces when im trying to sleep, and a soft jazzy tone folder when im trying to stay awake on the office, or whas it opposite