If it's the tutorial I think you mean, you need to be aware that all it does is remove the upper limit from models so far as the engine is concerned. You will still be constrained by the limits of available memory on your chosen platform. If you only have 32MB of memory, you will only ever be able to load 32MB of stuff, even despite the fact that your engine may be capable of loading terrabytes.
If that's the case then I suspect that you will need to start looking at some kind of funky compression schemes. Which are beyond the scope of that tutorial.
