Sounds like a lot of effort!
The Millennium double is really old tech these days. I suspect you'd end up with a very heavy boat - and possibly a compromised one since the hump is part of the design - it's part of the stringer and the longitudinal strength of the hull. These days most manufacturers have managed to lower the hump - but they're using new materials and higher quality construction.
Rob
Currently Epic V10 Elite, Epic V10 Double.
Previously: Swordfish S, Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...