My Update on CAD program, VariCADIt is some time since I have had time to look at re-installing VariCad. I have been using it both for mechanical work (small house extension) and for electronics (in educational aspect for myself).
Since I have just downloaded an upgrade to VariCad I decided to do a quick check on the installation. The LZMA problem I and others have encountered, now seems to have gone.

Started KDE-mini 2011.07 LiveCD and done an install to test and it works very well. I have not tested the 2012 VariCad-Viewer yet.
To install:
rpm -ivh /Data/xVariCAD-originals/VariCAD_2010-en-3.00-1.i586.rpmThen entered license details, ready to use.