QUOTE(aliumalik @ May 28 2008, 02:16)

My first goal is to somehow get gaps at the end of these files [...] I also need the cue+single file so that people can open it in nero and burn
QUOTE(aliumalik @ May 28 2008, 02:16)

How do I accomplish adding gaps at the end using foobar2000?
You don't.
QUOTE(aliumalik @ May 28 2008, 02:16)

There are no CUE files so I don't think CUETools will work
I think you're right but I'm not sure.
It sounds like you need to create cue sheets from scratch. I'm sure there are tools to make this easier for you but don't know of any. I made a batch to do this once, but it's not very sophisticated and isn't worth sharing.
Do this:
- Open EAC and start the CD Layout Editor (Alt+W or the first selection from the Tools menu).
- From the Layout menu, make sure Add 2 Second Gap On Append is selected.
- Drop all your tracks into the window and make sure they are ordered properly.
- From the File menu, select Save CUE Sheet.
- Close EAC.
- Open the newly created cue sheet with a text editor and remove the first instance of PREGAP 00:02:00 (the entire line). If you wish to use something other than 2 seconds, now would be the time to edit the rest of these manually. Don't forget to save it when you're done.
This CUE sheet should work with nero.
After writing this and thinking about how to handle this for playback of the files, why don't you just add the silence with a wave editor instead of playing around with cue sheets?