1. I have used Provia 400F and Ektachrome 200G in cross prossesd applications. Both will come out super contrast. And I find the look very edgy. You need a higher ISO film to start - reason why below. I have tried using Porta negative film and cross processing it to make slides, but the results weren't as spectacular as slide crossed processed to negatives.
2. You should shoot the film 1 to 2 stops overexposed in .3 stops increments to start to see what effects you like. The more you overexpose the more extreme the images become. Also use the same lab. Bottom line - same film, same lab, same exposure, same development time - same results. This holds true with any film, but even more so with cross processed film.
Here is a link with some very good general info:
And this link has info on the results from various types of film:
I'd keep trying. Also experiment with over developing when you the film to the lab.
Hope this helps a bit. I'll scan an example in, when I finish this whole colour management/calibration thing of my setup.
Regards, Art. (Hackman will tell ya how it's done in Photoshop)