woaw, talk about general topic
Ok, well, where to start ? I guess defining the words used would come first.
What do you mean by UAE ? (WinUAE ? running a ripper in UAE ?)
Which Prowiz are you referring to ?
Failing means a ripper didn't recognized a format it is reported to know ?
Generally speaking, a ripper rarely fails. Mostly some unknown format shows up, or some coder played with the known format to change it a little, preventing a clean mechanical rip.
As for the alternatives; your very question; it may vary. I guess that the first case which consists at using another ripper (Exotic Ripper comes to mind) comes here. Then, if this "fails" too, the Hex-editing part becomes a constant, at least to start. You must try to identify something recognizable "by hand". Calling for help at that point generally gets result
. Try EAB or here for that.