Hmm. I can't find which report I did something similar to that in. Honestly, it might have been when I was working with Crystal...
My thought is to try it with a Table on the outside, get your groupings together, merge your details row into one cell and stick a rectangle in it. Then copy your fields in it as necessary. If table doesn't work, try a Matrix.
Sorry I can't be of more help. If I find the report I was working on, I'll post more details.
Catadmin - MCDBA, MCSA
"If a person is Microsoft Certified, does that mean that Microsoft pays the bills for the funny white jackets that tie in the back???