window contents while dragging

[Antonio Bravo <tonio freeshell org>]

Hi there,

--> foreword:
when it comes to desktop/window mangers I use CDE, Mwm, WindowMaker or 
Fvwm on *BSD, Solaris, HP-UX and Linux.
But when I try to convert friends from windoze to BSD or Linux ( on 
their x86 boxes) and install them a usable destop with common apps, like 
word processor (Abiword, OpenOffice, Gnumeric), image manipulation 
(Gimp), multimedia stuff (Xmms, Grip, Mplayer, Xmcd, etc), and more, in 
such a way I can show them that it works better than Win98/2k/XP, I use 
to get them Gnome.I dislike KDE for political/philosophical/structural 
reasons out of topic here.

--> my question:
on some low hardware configurations I try to get the more responsive 
desktop. An important point is the ability to spare the drawing/refresh 
of windows content while dragging. Win2k can easily be configured for 
that , as well as KDE,
How can I do that in Gnome2 ???  I find no option in the configuration 
tools or through mailing lists/ web searching.
I will be sad to let former win users with KDE instead of Gnome due to 
performance issues...

(remember: it's about trying to show win lusers the truth religion; they 
just need things working right now.
for me I am just happy with C, ksh, Motif and Gtk,...:-)...)

thanks for an answer.