Seeking advice on database table design for storing images

I am working on an application that will store images with every product
ordered from a given company. Doing this type of application on other
databases, I have always been told to use a seperate table for the image
store. Doing this has given me the table designs listed below. My question
is: Is it within the design of postgres 7.3 to store 30k to 1mb images in a
bytea field, and if so can the two tables below be joined into a single
table without suffering adverse effects?

TABLE - tdatInvoiceLineItems
invoiceid   int8
productid  int4
quantityordered  int4
samplestocustomer  int4
adcost  numeric  10,4
adheight  float4  4
adwidth  float4  4
workorderid  int8
objectid  int8  8
needsart  bool

TABLE - tdatCustomerArt
lineitemid   int8
artwork  bytea
extension  varchar


Chris Gamble
CPB Inc
p: 972-579-1642 x 22
f: 972-579-1355