Well, first of all, you do not need ECS to run the 2024 in the 1008x1024 mode.
Second, it is officially a four grayscale monitor, but you are able to differ eight grayscales. I run the 2024 and OS2.0 on my A500 using 512K of Chipmem.
In the A2024 mode this leaves me with about 170K of Chipmem. Using it in PAL/NTSC HiRes Interlace it takes up the normal amount of Chipmem. OS 2.0 supplies a driver for the monitor, but the A2024 package includes a disk which contains new exec, graphics and intuition libraries to activate the 1008x1024 mode on older Kickstarts (1.2 and 1.3 both work fine with this disk).