wine users - Mar 2001 - dga, wine, and a tnt2

I have the transgaming version of wine which i downloaded from their 
sourceforge page. I recently got my hands on a tnt2, after having used a 
voodoo3. (dont worry, i didnt pay anything for it =)
so i installed everything, opengl games work perfectly (0.9-769 drivers). 
but when i try to run directdraw games in DGA mode, i get weird problems.
the screen is split vertically into 4 parts. anyone ever experienced this 
before?
and in monkey island 3, its not only split in 4, but also shifted half-way 
down the screen. so all you see is the top half of 4 squished monkey island 
views!

ive ried running it without dga, but teh frame rate is just pathetic.
my system is 
celeron 533@600
aopen ax64pro mobo
eagle tnt2pro 32meg with 0.9-769 drivers
xfree86 4.0.2
debian testing/unstable (woody)

any help is greatly appreciated

I've seen the same problem with a TNT2.  This is how I solved it:
I created a screen in X that sets the server to the exact resolution 
required by the game:

Section "Screen"
Identifier "GameScreen"
Device "nVidia Corporation|NV11"
Monitor "My Monitor"
DefaultDepth 24
Subsection "Display"
Depth 24                <- or whatever resolution the game requires
Modes "640x480"         <-
EndSubSection
EndSection