CAUTION: If there is more than one copy of the part on a drive you have access to... - the changes you make, may not be reflected. Generally speaking, SolidWorks is good about this...best rule though is to only have one copy.
SW Premium 2011
64 bit SP4.0
Intel Xenon X5650 @2.67GHz
2.66 GHz 11.9 GB of RAM