I doubt a coat hanger would be long enough...but I'd try to use something like that to trip the trunk release handle on the driver's side floor (assuming that it's in the same location as any other Z32 with a hardtop). If that won't work you could always take a knife to the top :) G'luck.
-Brad 1992 Z32 2+2 NA 1986 Z31 Coupe NA (For Sale)