Well, to answer both David and pr2, here are my combo boxes. Please note that apparently I was wrong, I couldn't get the cascade to work properly so 1st filters 2nd, and 3rd filters 4th and 4th filters 5th.
1st - cboInvestor, row source: "CSLA";"CU";"FHA";"FHLMC";"FNMA";"GMAC";"VA"
2nd -...