I have an "SST SST49LF160C" part that I've tried to use in my epia-cn board (Jetway). Reading seems to work okay, but erase and write fail. My other parts (winbond based bios savior, a winbond chip, and an "SST SST49LF080A") all work okay in the board.
Attached are some logs. These were taken over ssh and without the bios savior installed. I tried writing and erasing on the console and see the same failure.
On IRC, Uwe mentioned there may be a problem with the southbridge only mapping 1MB. Also, with Uwe's advise, I tried writing a variety of images (eg, all 0xff, all 0x00, etc.) but no luck.