i have finished putting together some 29.40 Detonator drivers for NVidia based video cards.
xeno_detonator_winxp_2940x.zip - 3.8 Megs. (removed)
all the changes of the 28.90 drivers are about the same as the changes for the 29.40 drivers.
one added thing to make note of, NVidia seemed to have fixed something that prevented the VSync setting in the Direct3D options from "sticking" (you would turn it off, click on Ok, and then go right back to its properties and it would show nothing has been set for it - even though you just changed it).
also, since the 29.40 drivers seemed to have worked fine for me, and have fixed an issue that i've noticed in past drivers, i removed the download for my 28.90 drivers to save bandwidth.