I can't help but wonder why use Mac if you're just booting into Windows? I can understand if someone used virtualization software (e.g. VMWare Fusion, Parallels, or Sun Virtualbox) but Boot camp? Normally, that is only desirable in case of wanting to play Windows games or for where you didn't buy enough RAM to handle running two computer on same machine at same time.
As for the read-only, we really need more information about how files are setup - can you write and read and delete any other files in the same folder? What filesystem are you using? How is your computer connected to other computers?
Bob - so you know - Boot Camp is merely a bootloader for dual booting. When it's used, it's basically just any other x86 box running Windows. There could be differences due to Mac using EFI and not BIOS and maybe some low level drivers (hence the gaming) but that generally shouldn't have any effects on the normal user experience.