Go take a welding/fab course.
My guess is you will have to make MAJOR modifications (such as taking your carpet out, cutting channels in your floor, and welding new pieces in.) to get the drive axle, diff, and rear axles to fit.
Not to mention you will probably have to rebuild your exhaust. /ubbthreads/images/graemlins/banghead.gif
Ps. I am not an expert on the underbody of this car, it is possibly they have similar channels to the vr4 and it will be a partially bolt on procedure. I hope so for your sake.