This fix corrects depth of the in-game HUD as well as the rear-view mirror.
To install, unpack both Zips where SEGA Rally.exe is located.
Note: There is a disabled pixel shader, which is the RPM digital meter. It is purely cosmetic, it does not affect in any way the ability to know your RPM as there is also an analog needle meter. Once I know how to add depth to a pixel shader I will re-activate it. In any case, the game now plays like a 3D Vision Ready title.
Another note: I have set up the shader depth so that it matches the 3d depth driver settings I use (and recommend) which is 80%. You can adjust the following value in brackets: def c220, [0.80], 0, 0.0625, 0 in shader B503E533 to match your desired depth setting for best results. Also, I have set the rear-view mirror so that it appears closer than the rest of the hud, in my opinion it looks better this way. You can adjust it's depth in the same manner in shader A5AB3BA0.
One final note: Press your Cycle Frustrum Adjustment key once then save your 3D settings in order to be able to use high depth.
I may try to further adjust this fix (with texture separation) at a later date but no guarantee on that.