Default Folders on Titan US-071 - Can't extract firmware

[MysticMan]

Hi, friends of MyMPx!
I'm MysticMan from Argentina, this is my 1st post. Excuse me for my bad English. hope you can understand it well. If anywere here can understand Spanish, I'll write in my language.

After this brief introduction was made, let's get to the point:
I've bought a MP4 (Titan US-071 2A, identified as "Rock USB Device", Rockchip).
I want to mod the main firmware (images, etc.) using s1fwx 3.3 program.

Problem: When I connected the device in file transfer mode (two removable units appear in "My PC"), Windows XP Professional showed me that unit G: (for example) has no format. After several attempts, the only way to access the disk G: was to format the drive. All files stored in the unit were deleted (including all default folders), but the MP4 device is still working. I upload my music directly in individual folders or loose in the drive. I've reinstalled the brand firmware (P4-071-080111.rfw) but the default directories doesn't appear.
S1fwx 3.3 (extract.bat) doesn't detect any removable device.

Thanks and sorry for my bad English!

[MysticMan]

Folders can be created again putting this new ones in the usb drive after format:
-music
-video
-DC
-DV
-FM
Some of them can be automatically created by the OS from the player (like FM folder).

S1fwx 3.3 doesn't detect any removable device because it's formulated for use in Sigmatel chips (.bin file) and i've a Rockchip player.

In order to mod images from the player, i'll use Dancemammal's editor and RKLogoEdit1.0.0.16 (this last one have trouble managing P4-071-080111.rfw firmware file). But Dancemammal's editor don't open images correctly.

Regards,