Help with cracking Stunt GP

[themadsinger]

I am having a lot of trouble getting this one to work.

It is a Katana DA game which does not require any files to be ripped out or downsized - it will fit on a CD as is including the CDDA. There are just 2 bins - ip.biun and 1st_read.bin. I have tried using Hack3, dahack, cdda and also #####ing the the two other hex strings (which were not present), but on all of my various burns, it boots up to the load screen which has the big CD on the screen saying "loading" and then crashes out to the DC explorer screen with the four options on it (memeory card, controller etc). Can anyone help me with this ?