Upgrading xorg Lenny->Testing

[Felix Natter <felix.natter@smail.inf.fh-brs.de>]

hello,

I am currently running on VESA driver with Lenny's xorg (7.3),
because my Geforce 310M is only supported in xserver-xorg-video-nv
>= 2.1.17 (Squeeze).

Now I can try to build the xorg, xorg-server and xserver-xorg-video-nv
source packages and install them, but I must rely on this system
so my question is whether there is a chance that this will break
anything?

Thanks,
-- 
Felix Natter