http://bugs.winehq.org/show_bug.cgi?id=13939
--- Comment #10 from David Hedberg david.hedberg@gmail.com 2009-02-07 05:48:32 --- Created an attachment (id=19308) --> (http://bugs.winehq.org/attachment.cgi?id=19308) Implement missing function
The psp7 installer crashed for me with the latest git so I haven't tried it with this patch, but this should implement the missing function.