Well the firmware images for the S10 have the extension .abs, rar files should extract the file and size is 4MB. The latest is on the shenzen or Wydvb sites and is named "OPENBOX_S10_110914.RAR"
Before changing the firmware you must check if the box is a clone if so dont upgrade as it wil kill the box. Instructions in the wydvb.com site.
Then if not clone, download and extract the file to a usb drive, plug it in, press menu, select the tools (suitcase icon) press ok, go to dump by usb, press ok, select dump mode image files and select start and press ok. that will save your factory image.
Then select misc files for dump mode and select the tp _prog, cccam.cfg and any other files you feel are needed and save them as before.
Now you can upgrade the firmware, in Tools menu, select upgrade by usb, select upgrade mode as image, select the file you downloaded, then select start and ok the "are you sure" message. Then wait for the upgrade to finish.
Thats it. enjoy your S10!