s1res 4.1 was available as a free download on our software library. The most frequent installation filename for the program is: s1res.exe. The software lies within System Utilities, more precisely Device Assistants. The following versions: 4.1, 4.0 and 3.6 were the most frequently downloaded ones by the program users. This free tool was originally developed by s1mp3.de. You can run this free PC program on Windows XP/XP Professional/Vista/7/8/10/11 32-bit.
From the developer:
s1res (s1 resource editor) is a open-source win32 gui tool. With this program, you can modify or change all possible resources of your s1mp3 player, like fonts, text strings, images and icons. You must connect your mp3 player and choose Import Firmware from the menu, follow the wizard to extract your firmware. Finally, select Export Firmware and send your new firmware up to the device.
You may want to check out more software, such as EasyGPRS, which might be similar to s1res.