"Display DirectDraw Update (DDU) patch as well, others consider it optional"
Those are the only two patches needed.
Why I say that others think it's optional, and they have a point, in that 9 times out of 10 IF you jump from the install to a glide wrapper AND it works, you don't need DDU.
However, if you jump from the install to a glide wrapper and it DOESN'T work what then?
At that point, with DDU installed you can use LB2config.exe to adjust the game between software mode, 3DFX mode or D3D mode. Some people can only get this game to work in Software or D3D (I would guess that it's a small number of folks, with that video card you may be one of them, hope not though).