I haven't tried that NEC version, so far. I have tried the newer Broadcom version 00.71.V0.04 (MR 7.7) and it does not work with any of the cards under 6.7, at least for standard LSI/Avago/Broadcom cards on standard systems (vs. any customized NEC cards on NEC systems). I do know that MR 7.7 works on my current hardware, under 6.5, and I'm dealing with new-ish hardware here (9271i-8cc in the lab system, 9361-8i in the primary). Neither system picks up anything under 6.7, however.
With any luck MR 7.8 will be out soon and will hopefully still support the 92xx and 93xx series cards, at least (MR 7.7 officially supports 93xx and 94xx but 92xx works as well). As for hardware older than those models, I guess we have to wait and find out (I'm hopefully that the software will function for the 2308 onboard chips as well as I have to support several installs that use this for raid1 boot devices).