I found out about Maptool a few weeks ago and experienced the same problem you did. Unfortunatly due to some behevioral tick I couldn't get started until I had programatically sucked in every object from the Dundjinni & RPTools forums and organized them.
This torrent is too small. I used a web site downloader to do the same, but not from RPTools, just Dundjinni. I pulled over the image files and the zips, then recursively unzipped and deleted all zips. I only pulled the "uploads" folder (not accessible directly from the web site) and just my Dundjinni images are 7GB after unzipping.
I have not further organized them because they are neatly in the creators' folders. This way, should I want to post something or disseminate it in some way, I could contact the owner. Once you start organizing them, that becomes difficult at best as you can't tell who the art came from and you can't search by image name on the Dundjinni forums. I also use Windows search to find the images (I DO NOT add them to my resource library), so leaving them organized by creator works for me.
Since technically, these were publicly available, I wouldn't mind sharing, but someone would have to tell me where to upload it, as my ISP's not fast enough to seed it from my computer. As far as I recall, the uploaded images are not necessarily copyright free, though they are free to use for personal use.
Alternatively, you can download them yourself using WSD
, just start in the forums and only have images and compressed files on. (I think it took about a week for mine to finish with my slow ISP