Overcoming Guild Wars 2 screenshot limitations

As mentioned in a previous post, I play Guild Wars 2, and like to take a lot of screenshots. The game client has a few annoying limitations though. First off, it can only output JPEG or Windows Bitmap (BMP) format; I've set it to BMP for highest quality, but Capture One 9, which I use for editing, doesn't support this format, necessitating a conversion to something more suitable. The second problem is that the client can only write 999 files to a single folder (named gw001.bmp ... gw999.bmp). When it gets to 999, it won't write any more, and »