Was hoping for a lifeline to sanity with this. 
Trying to make a model using zspheres. I started with the imageplaneX 3D tool (following the chapeter in the book Introducing ZBrush, by Eric Keller), applied the side and front view of my character as a texture and started using the spheres as subtools.
The problem is the whole thing crashes every 2 or 3 minutes. Since i am new to this i may very well be doing things in the wrong order or just making a very basic mistake.
Using ZBrush 3.5, on a G73Jh Asus lappy, with Win 7 64, with 8Gb of Ram, ATI Mob Radeon HD 5870 graphics card.
Is any of that enough info to get some help? I have also tried to find where i can optimise the way the program uses my hardware, the way i do with PS, but no luck.
Any help or tips of direction in which to search is appreciated. 

