Format of raw CF img file?

[TheShrike]

I used the HDD Raw Copy Tool to dump a copy of a compact flash drive to an uncompressed img file so I can poke around with the image to see what's wrong with it. I know the CF became corrupt, so I just want to see exactly what (byte for byte) was written in the wrong place. I have several questions about how to proceed:

Is there a description of the format of the *.img file somewhere? <---- This is really what I most need
Is the image in 1-1 correspondence with the bytes on the CF (or is there a header, tags, etc. in the file too)?
Is the data on the CF serial, in the sense that there's a first byte, second byte, etc. ... and last byte?
If it is divided into sectors, is there a description of how these sectors are organized (size, etc.)?

I just want to use a hex editor to look around, not a tool that hides the raw content of the file.
My thought is that I really want to manually poke around like you once could do with "Norton Utilities", or a low-level sector editor, but just using my hex editor instead. So I need to know offsets of interesting objects (specific sectors, FAT, etc).

This is a little open-ended, but any comments or suggestions about documentation of the dump format would be appreciated.

[labtech]

Check out Winhex

[HaQue]

also checkout the datasheets of any chips in the Card, and see how they manage data, page sizes structure etc. this info will be chip specific, NOT image file specific.