This is a fundamental question about emule plus that I don't understand. I'm using my real experience as an example:
I'm trying to download a video file of about 700Mb, which has only 1 source available. Whenever the source is opened, I'm spending most of the time on que. Couple of times in a day, I may be able to download a few Mb. Imagine how long I've to wait until download is complete or the source becomes unavailable totally. Here's my question:
I understand people have to line up to download from a source. However, what I can't understand is that while others before me are downloading, why aren't they becoming sources for others to leach from similar to bit torrent? The GUI at all times only showed the same single source, meaning no other sources were available. I would imagine that as more people are downloading, more sources will open up and the speed will be faster.

You can see sources right after they have at least one complete part (and even before that if you have some parts complete). Sources of the file exchange a list of sources they can see. Ideally, if you never see other sources that means that nobody else downloads it.

In real world if you have LowID, you won't see other LowID sources.
Besides that, even if you have HighID, you won't see LowID sources which have a full file and are connected to a different server.

You can check how many sources servers report. Run a global search for you file using file hash (read here how to do that:
http://emuleplus.info/forum/index.php?show.../FAQ/Tips,1910)

First I have HiID and so is the source. I did the global search with the ed2k file name and came up with only 1 source. Since I'm constantly on queue I can only explain the situation as everybody on queue is trying to download a unique file from this source making the lineup so long but yet no new sources generated. I find this situation incredible. I'm wondering if I just ask 10 of my friends to start downloading this file will it actually increase the download speed?

Do you see other sources in your download queue? If not, you're probably the only one downloading this file from that source.
Other people most probably download other files from that source, they populate the queue.

Few sources might make it a little better. You can even run multiple eMule versions yourself, but it requires some tricky configuration (different user hashes, different ports, different shared/tmp/config directories, plus flag enabled allowing to run multiple instances).

Hi. I'm also trying to download a 700 Mb file for about half a year and I stuck at 88,2%. Almost always I have a high ID. Except me there's only 1 source which has the same parts I have. But sometimes another source appears and it has all the parts. Last time it happened, except me there were 2 sources: the one with 88,2% and the one with 100%. At that time I was about 319 in queue. I don't understand how I can be 319 if there are 3 of us. And if I wasn't downloading then the other source was. So why that source still has 88,2% (the same as I have)? The source with 100% was quite a long time online (6 hours, I think). And if there were at least 319 of us then why I didn't see them? It seems that when the source with 100% parts appears, everyone is in the queue and nobody is downloading. Please, someone, help me if you can

The waiting queue is not only for the file you want to download from the remote source. The remote source has one queue for all files it shares. Plus, files it shares can have different share priority.

Thanks Aw3. Now I understand.