you cannot install OS3.5 on a clean hd.
you must have a wb sys installed first,albiet wb3.0 or 3.1.
as wb3.0 has been freely available on amiga format cd`s since approx 1998.
i dont see any problem in sending you a copy of the install disc.
OS3.5 does have wb3.1 on it.
if you do install OS3.5,from wb3.0 then 3.1, you WILL find your CD3 icon missing.
been there :-) its a real pain to install from wb3.0.
thats why i recommend for you to get a set of wb3.1 disc`s in the first place.
by the way i hope you have at least a 8mb mem card installed? an 030 accelerator would be better.