well, download and unpack last ant build anywhere on your hard disk, then run Eclipse, go to
Window > Preferences > Ant > Runtime > Ant Home
show that folder, and now Eclipse will use not built-in ant, but yours. I use this way, and actually prefer it, because now I have the same ant version in command line and in Eclipse
in the same window you can add any other jars with 3rd party ant tasks, and they will be used by ant (just 'add jars'/'add external jars')
