well, i've did the string method, and it doesn seem like there's much of a problem. if it's of, its only by like 1mm, but then again, there's a possible 1mm error that i could have made from not angling the ruler correctly. im just gonna go with placing the spacer in.
to answer the guy's question (sorry, forgot your name), i believe you place the spacer between the cup and the frame. that seems to be the most logical place to fit it.

thanks for all your info guys

ps, if anyone else has this type of problem and want to ask me about it, email me at D_W_Guy@hotmail.com. also, those of you who have the same setup, 53cm steamroller (doesnt have to be 53cm) and sugino 75 track cranks, but dont have this problem, email me to and let me know. again, thanks all...