Yes, i meant if you could point me to a guide for the new openBH installation (flash) process...
...will i need to save any other configuration?
All images may be flashed exactly the same way: if you have ever flashed an image, there's no difference in OBH or any other one.
Other settings to save, actually, if your system (LNB used) is complicated, well, you might take note of your tuner configuration. But, as your box is old and it does not have FBC tuners (which are the most complex to configure) it shouldn't be so difficult to reconfigure.
Otherwise, you can save the file
/etc/enigma2/settings
but it requires expertise to be read and to extract the specific lines you need and to be put in the
settings file from OBH.
I'd say that bouquet and channels are enough to save, after all.
Instead, if you don't know how to flash, then follow the links kindly provided by p.rodrigues