Hi,
The Eclipse download takes some time as it is around 200 MB. It also depends on your internet connection. For instance if you have a 200 KBPS connection it could take hours
to download. You can download eclipse separately and then you can remove it from the build script ( build.xml ). The build.properties file sets the eclipse home. You have to change
it to wherever you have downloaded eclipse. That's what I did and it works perfectly fine.
I was able to download the helios version mentioned in the build script ( build.xml ) without any issues. I was able to download eclipse within minutes at work because of the fast internet connection. But I have experienced problems downloading eclipse & some of its plugins at home because of slower internet connection.
Hope this helps.