SQL Image Fields

I need a second opinion from someone out there. I have a database with about
20 tables. Each of these tables need to store one or maybe more images for
each record. I cannot use a varchar field to point to an image file on the
server.

Therefore, I am trying to figure out if its better for me to put an image
field in each table OR make a table called IMAGES that has multiple Nullable
Foreign keys and use one table for all images. My dilemma is that each
record will have a lot of Null values because I will only be using one of
the foreign key fields for each record in the IMAGES table.

For example, an IMAGES table with the following fields:
ImageId int PK
FK1 int Nullable
FK2 int Nullable
FK3 int Nullable
FK4 int Nullable
FK5 int Nullable
ImageData image

Please help if you have some experience in storing images and files in a SQL
image field type.

--
Peter A.