I know what Anti Aliasing is all about and what it does, but I'm sure that's not the problem.

Dear SimplyMaya forum members,

I have (what I think at least) is a problem.
Whenever I render the shadows and 'glows' are not appearing smoothly.
They should be gradient but you can really see...

Your card is too weak I believe. The GeForce4 MX series is a 'tuned' GeForce2 I once heard.
Anyway, your card does not support pixel shading so it's a card problem, not a driver problem.