they should all be added,after all they were special show cards just given out at shows that year.the only ones i would not add are the cards where the card year does not match the show year,such as the 1998 donruss cards with a show year of 2001. i have seen these,and a lot of the pacific cards 93 and 94 etc. with a 98,99 show stamp.these should not be added.i bet the pacific cards you have are like this.THESE CARDS ARE A JOKE! LETS USE SOME COMMOM SENSE!there's a ton of these.here is case in point.
http://juangone.com/pictures.php?cardid=1629
this is hand numbered.is it legit?
just because it is not serial numbered does not mean it should not be added.if the show is the same year of the card then yes.here is another way to look at it. if the card is from a Chicago,Hawaii,National,Fanfest,Sportsfest.or any large show "we all know what one's they are"and the card is the same year as the show stamp. ADD IT! if its from BILLY JO JIM BOBS SHOW,COME ON!