i never got the chance to use the original zsphere, but i heard those weren't totally awesome
you should upgrade
it's free
and if you dont then i think you'd end up having to pay for the program that's a few versions older than yours if you upgrade to a much later version
in any case when you upgrade to a newer version the new zb just installs to a new folder so you can keep the older version
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Objective C, C#, Java, MEL. Python, C++, XML, JavaScript, XSLT, HTML, SQL, CSS, FXScript, Clips, SOAR, ActionScript, OpenGL, DirectX
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D