i need help regarding the above topic
I have done a ESXi installation on a 755 SFF model - it is very close to the 745 and I believe that the majority of what I had to do will work for the 745 series.
http://drewsrambling.blogspot.com/2008/09/esx-on-dell-optiplex-755.html
As I was using the SFF model I needed 1/2 height cards, if you have the normal tower units that is not a requirement.
Andy
abradley@reawire.com