When loading a string setting, expect in the same form we would have

[u/mdw/putty] / website.url

[InternetShortcut]\r
URL=http://www.chiark.greenend.org.uk/~sgtatham/putty/\r
\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0