Lpc2000

Hello,
I have some code running now on a Embedded Artists 2148 board that 
accesses a SD card (based on the philips code). So I can read/write 
individual sectors....
My plan is to use a SD card as a "circular" buffer for data, so I 
won't be using a real "file system" like FAT16 etc.
What I need now is a simple program (or some ideas for it) that can 
access a SD card when connected to a PC using "raw" sector access....
That way I will be able to read the data from the card when it is 
inserted in a card reader in a PC.

Any ideas/pointers ?

Regards,
Carsten