Changing libraries location being made through target shortcut only, unless through cmd or registry if such is possible, it doesn't seem like it is possible to execute 'C:\Windows\explorer.exe' loading another location than its default location.
http://forums.mydigitallife.info/threads/10559-Windows-7-Default-Explorer-Path-Changer

Edit: problem fixed, File.lnk containing target '%windir%\explorer.exe F:\' works like a charm. File is on usb key so execution works if key is plugged, doesn't do anything if not plugged (file not found) and works if plugged back.