>>>>I suggest that your client buy a USB card reader, they are usually sold for 10-20 USD. Make sure that the card reader accepts SD type memory cards.
>>>>
>>>>>>Are you sure that you really need a device driver at all? Most memory card readers come with a driver CD, but usually the driver CD is not necessary. For Win7 I doubt that you need to install the driver, for XP maybe.
>>>>>
>>>>>My client says there is no driver for Windows.
>>>>>
>>>>>Apparently this device is normally only used on cameras - primarily in legal circles to document something photographically. These allow writing a file once - no updates.
>>>>>
>>>>>The client wants to be able to put photos on the device from a windows machine (automatically I assume).
>>>>>
>>>>>
>>>>>>
>>>>>>>One of my large clients needs to get windows drivers written for XP and Win7 to access a write once SD type memory device.
>>>>>>>
>>>>>>>If you have experience (good experience!!) developing device drivers for Windows, send me an email with contact info and relevant job/project history and I'll forward your info to my client.
>>>
>>>This is the device..
>>>
>>>http://www.dpreview.com/news/1006/10062301sandiskwormsd.asp
>>>
>>>There are apparently only a handful of specialty cameras that will write to it. My client needs to write to it from a PC based camera.
>>
>>I don't know the specific SD card you refer to, but I would definitely try it in a USB or internal card reader which can handle SD cards. In principle a SD card is a SD card, the write once feature is most likely done by simply ignoring the write signal once the cells are written to, in hardware.
>
>No. Already tried writing via standard digital camera and through a Win7 system with SD port. Error trying to write or disk is write protected error.
>
>No problem viewing what is already on the card (image from a camera specifically designed for the SD WORM card).

Apparently it is proprietary memory and controller and requires an sd worm compatible camera:
http://www.sandisk.com/business-solutions/sd-worm/sd-worm-card

and:

The company says the drives can be read by any device that reads SD cards but can be written to only by devices with firmware specifically designed to recognize it, including certain cameras from Fujifilm, Nikon, and Pentax and an Olympus audio recorder. Other devices are said to be in the pipeline.

SanDisk is known for its NAND flash technology, but its sounds like SD WORM is more likely a more sophisticated version of a different type of non-volatile memory, the One-Time Programmable (OTP) memory used in applications such as game cartridges. SanDisk simply says SD WORM uses its proprietary memory and controller technology.

http://blogs.pcmag.com/miller/digital_cameras/

More: it seems that your only hope of getting specifications is to contact them directly:
http://kb.sandisk.com/app/answers/detail/a_id/179/kw/sd%20worm/r_id/101834