I have seen this on 2 other fuji cameras, I suggest not buying Fuji until they take notice & fix it , but in answer to ure query I honestly think there are so many small parts it may be impossible to re-assemble.It sounds as if the lens has come out too far & can't retract so if u get it open concentrate on that first,as regards the screwdriver-I don't know the one but perhaps file down on old one to fit ? TH cam is basically knacked anyway.
David
June 2008