The H8000 and Eclipse are different machines and work in different ways. The reason why you can load 2 programs into a single dsp on the Eclipse is because these programs are much smaller. The H8000 in general runs larger more sophisticated programs, and thus only one fits into each dsp.
But, the H8000 offers you the option of combining smaller programs using vsig, which, if you are prepared to invest a little time in learning, may be the solution for you.
