Mods that help in slower machines?

Hello to all!

I'm planning to install M2TW on my rig which has the following specs:
WinXP Pro with SP2
AMD Athlon 1.1GHz
512MB RAM
DirectX 9.0c
9600 SE 128MB
nVidia nForce Audio

I know it's not a fast PC, so I'm looking for mods or game tweaks (video settings) that would enhance FPS without affecting the gameplay or without affecting the graphics quality very much.

One such mod is the reduced city textures mod (though I still have to try it out), I'm looking for other such mods or game tweaks.

Thanks!