si amigo estas todo en lo cierto el problema es que para que muestre las imagenes debes ponerlo asi (debes quitar el ";"):
[IMAGE_FOLDER]: /usb/other/ini/fabito

;[CUSTOM00.ICON]:0xE5B0;
[CUSTOM00.ICON]:bk1.jpg;
[CUSTOM01.ICON]:rojo.jpg;
[CUSTOM02.ICON]rince.jpg;
[CUSTOM03.ICON]:nena.jpg;
[CUSTOM04.ICON]:love.jpg;
[CUSTOM05.ICON]:guacha.jpg;
[CUSTOM06.ICON]:flor.jpg;
[CUSTOM07.ICON]:rosa.jpg;

[CUSTOM_MODE]: 0x02; 0=static icon00, 1=sequence by time, 2=random by time, 3=sequence by Day of week(Sunday=icon00, Mon=icon01, etc)
[CUSTOM_TIME]: 0x10; Time period before background changes in minutes
;----------------------------------------------------------

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