Download the Wellon Programmer software at http://www.weilei.com/
At least if you set it to a VP290, and a EPROM, it will load the .bin file and split it into Odd/Even. You can then save (and/or edit) the file back to disk. While it will tell you the programmer is not connected initially. The software will work fine.
Does anyone have a preferred stand-alone program that can split a ROM image into high and low components? This feature on my programmer software doesn’t seem to work properly (or I’m just doing it wrong), so I wanted to try a separate program.