As a more general solution, saw a LinkSys NAS box at an office supply store, $100 US. Has FTP and HTTP servers, holds two HDs. Could avoid some trouble, at least allow ECS access to files when Vista is having one of it fits.
This solution will also work with OS/2 and Vista if the FTP and HTTP servers are running natively on either OS. This is the current method I use to share files between an XP and a bunch of OS/2 and eCS machines. The FTP and Web servers are all running on the OS/2 server.
The only problem I have run into is that FireFTP on... any platform (unless they've finally addressed the issue) has problems with large files. Usually, I run FileZilla on the Windows machine and transfer to and from there to the Warp machines.
-Robert