The cabs for Mega Manila2D here:
http://forum.xda-developers.com/showthread.php?t=541750
You will need to download about a dozen cabs and do one registery edit. I have mine set to autoinstall using Sashimi. I used to run it on top of Mattsm 6.5 23047 and had 19.85MB free at boot.
I am using a newer Mega manila build from that thread that features weather on the home tab. It uses more memory, I currently have 12856k free at boot on top of jmartin72's 23060 build. I am considering loading the original Mega m2d to see if I get more free memory back.
Some notes:
WM6.5 will sometimes unload m2d (it will automatically re-load).
I have a memory leak that drops my free mem to 3-5MB by the end of the day - not sure if it is M2d or WM6.5.
Battery drain can be really bad (need to charge nightly) - again, I'm not sure if it is WM6.5 or M2d.
I can't run MS voice command without hitting memory issues throughout the day
I have to disable M2D to run iGo8.
Despite all the drawbacks, I use M2D all the time. It runs very smoothly and works great. I just have to soft reset once a day to keep things happy.