when i double click my ESF Setup...the License Aggreement blah blah blah page comes up...i clicked " I Agree" when i click I Agree the ESF checkmark is Gray(why is that so?) i clicked Next then the next page "install" button is gray y is that?
No you don't.
You need to run half-life once before installing esf, just run half-life nad as soon as you get to the menu exit half-life. If it's the first time you have run half-life currently, then run the hl training room, walk around for 10 seconds and then exit h; and proceed with installing esf.