Ah, I see. You should really try to convince the client otherwise. You, after all, are the one with the experience and knowledge; they shouldn't be telling you what is best.

In any case, sorry I can't help. I don't do work with Microsoft products and haven't ever stored files in a DB. If you were using MySQL though, you'd probably want to use a blob for the column type. I believe it can hold binary or ASCII data. I don't know if MSSQL has that type.