Ms Visual C++ 2010 SP1 32 bits version even on x64 systems > [link]
and for Direct3D rendering of the wave seekbar, DirectX Runtimes 9 (not installed on Seven by default) > [link]
Install Foobar if not already done (Normal or Portable installation, as you prefer)
If Normal install done, extract the .zip file into your foobar2000 user profile folder, on Seven it's C:\Users\<your_username>\AppData\Roaming\foobar2000\
If Portable install done, extract the .zip file into your foobar2000 program folder, for example C:\My Programs\foobar2000\
Step ONLY for Windows XP users: Download this extra .zip file HiFoo_Add-On_for_XP.zip: [link]
Step ONLY for Windows XP users: Extract the extra .zip file HiFoo_Add-On_for_XP.zip to the same foobar2000 folder as above, it will overwrite some WSH Panel Mod files and so will allow HiFoo to run with XP
When prompted, select as default interface "ColumnsUI" then OK
Now HiFoo layout is visible, first your have to configure your media library : click the icon button before the playlist "Library" or use the main menu entry "Library>Configure"
Once media library configured (wait a little bit for foobar2000 monitor your media library folder), you may need to restart foobar2000 if the playlist "Library" is not populated
Installation is now over, you may have to set some other useful features, like "Cursor follows Playback" (menu "Playback") ...