I can. I can. I can.
It will be without pictures first. If you do not get it then I will post something with pictures instead.
First of all install asio4all. Some people have problems with the 2.7 version. If this does not work try to install the 1.8 version. I suggest you get 2.7 though.
I assume you allready installed it. So I will continu to the config part.
Again assuming you are installing asio4all just to get better quality output you want to use the highest latency possible. (2048 samples I think) If you do not install asio4all just for better output quality, please let me know. You will have to set it up differently.
Press the button for advanced config window. You will see the latency compensation on the top right. Set both in and out to "0".
Depending on the device you are using asio with you want to enable some of the other features. You do not want to enable hardware buffering.
Make sure that the devices that you want to use are enabled and the others are off. (when foobar is playing a lot of devices will tell you they are "beyond logic". So make sure foobar isn't playing when you enable your device.)
So far for asio4all itself. Now for the foobar part. (exit asio4all config window first)
Get the asio support dll from here:
http://www.foobar2000.org/components/index.html
Unpack this file with winRAR or 7z or whatever program. The unpacked file should look like this: foo_out_asio.dll
Copy this file in the components directory of foobar. Mine looks like this:
C:\Program Files\foobar2000\components
If you start foobar for the first time it will tell you that you installed the asio plugin. If not something is wrong. --> Read the above part again.
After entering foobar go to File\Preferences\Playback\Output
Select the output device:
ASIO: ASIO4ALL v2
There should be another menu now called ASIO virtual devices. Go there and select ASIO4ALL v2 and press edit.
You should see a lot of channels. (depending on how many you have got)
Suppose you've got an USB-DAC, like me, there most probably will be 2 USB-DAC channels. Configure those as left and right.
Press the left mouse button on a channel you want to activate. The channels you do not want to use should be saying "none".
After you have done all this restart foobar (and maybe your computer).
It should work by now. If it does not please ask again and I (or someone else) will try to help you.
Good luck.