On an NTFS partition, the maximum length of a filename is 256 characters. That's gotta be enough unless you have huge comment fields or something, and I'm not sure those comments can even be saved as part of the filename.

Also, keep in mind you'll lose any special characters in this filename conversion process. The most troublesome ones I've seen are : and ?, with the < and > signs also causing a bit of a headache. You can find those characters with an advanced emplode search and take note of them before downloading and fix them later.