Final Cut Express Problem

Hello, I.m trying to re-master the audio on an old .mpg clip. the clip is sized at 320x240...when i bring it into Final Cut Express, it resizes it to 720x480 [it does not resize, but rather puts the 320x240 image on a 720x480 black canvas]...when i go to render it [which wasted 5 hours!] it produced the same image, I want the original 320x240 image, I had exported it to quicktime which i believe is part of the problem. How can I export this and retain it.s original aspect ration [to put out on a VCD]?

Thanks,
Christien.