The installation steps are clear, but the reasons for doing this type installation are not quantified.  You mentioned that the performance "may" be better.  I think some examples of what performance was like when the tempdb files are located on SSD SAN are compared to tempdb files locally would be helpful.  For example did you see a 50% improvement on certain queries that made high use of tempdb or is this more like a 1% improvement.  I expect this would related to DB sizes since it is clear to me that moving large amounts of data over the SAN would be slower than local disk - the question is how large does the data need to be before it is noticeable?