schanker21: Yes, if you jump through a few hoops you can write to a ReiserFS partition in windows (cygwin, NFS, Samba..)
You have a few options, really none are going to be as appealing to you as you would hope, but nonetheless you aren't 'stuck'. Good thing there's choice
If you can get a hold of an external drive, even temporarily, you could move the files you want to keep, format the drive to fat32, and then return them. Same idea, but instead of another drive, you could archive them to CDR(W) or DVDR(W)(OM); this idea is nice because it gives you a backup (which it would seem you lack, otherwise this option would have likely been exercised). Backups, on files you feel you can't live without, are very handy at times. Very handy.
Another option is to try something like copying these files to your "C" drive, formatting, then copying back.
Yet another is to enable write access on your ntfs partition. You probably don't even have to do much to do this, but as noted, this is really not (quite yet) too stable. You'll be modifying the files and adding/removing content which will change their filesize, and my understanding is that this is where the write portion of the NTFS code could hiccup and render your data useless.
Yet even another option, backup your data to your gmail account (using gmailfs) and then copy it back afterwards.
Plenty of options!
Certainly more, I just can't think of them right now off the top of my head.