Where I can find a detailed and simple tutorial to start create foobar skins?
You don't. Select a layout or create your own, basically.
http://wiki.hydrogenaudio.org/index.php?ti...ppearance_Setup (http://wiki.hydrogenaudio.org/index.php?title=Foobar2000%3a%44efault_User_Interface:Quick_Appearance_Setup)
http://www.head-fi.org/a/foobar2000-appear...-themes-configs (http://www.head-fi.org/a/foobar2000-appearance-customization-skins-themes-configs)
You can try others' configurations and learn how they're made.
http://www.hydrogenaudio.org/forums/index....showtopic=58574 (http://www.hydrogenaudio.org/forums/index.php?showtopic=58574)
To change how to display the different formatting for columns etc. the following is good to know.
http://wiki.hydrogenaudio.org/index.php?ti...tting_Reference (http://wiki.hydrogenaudio.org/index.php?title=Foobar2000:Title_Formatting_Reference)
Or you could go crazy and learn JScript and Photoshop to make "skins".
http://wiki.hydrogenaudio.org/index.php?ti..._uie_wsh_panel) (http://wiki.hydrogenaudio.org/index.php?title=Foobar2000:Components_0.9/WSH_panel_(foo_uie_wsh_panel))
Remember: "foobar2000 is an advanced freeware audio player for the Windows platform."
Run 2 portable installations of foobar2000 at the same time.
Go to Deviantart and download somebody else's ready-made skin and install it in portable mode.
Run it and configure it.
Make a copy of it.
Run both of them at the same time.
Use the original for playing your music and having fun and do not destroy it by trying to edit its config.
Use the copy for testing and hacking and going under the hood; modify parts of the layout and see what happens; JUST DO IT! ...press the APPLY button.
One day, a few years down the road, you will forget about the original skin and will only use the one you modified.
Also, add a third party component named "foo_jesus" to your foobar2000 copy; it automatically backs up your layout at regular intervals so you can go back in time.
You can also find collection of best itunes skins here: http://foobarskins.com/top-10-foobar2000-skins/ (http://foobarskins.com/top-10-foobar2000-skins/)
Cheers
or more choice @DeviantArt : http://browse.deviantart.com/customization...dia/foobar2000/ (http://browse.deviantart.com/customization/skins/media/foobar2000/)