you can create a fictional league. Then by using the .csv file take players from each year and then create a text file. save it. then import that file into your game. that gets your historical players.
somewhere on the page with the draft is a box to check (or not) to have game generate fictional free agents. Leave that unchecked. Also use the International Complex, all those players are fictional.
If you do not have enough players in your draft, on the free agent page, you can select create fictional players from the drop down menu (you can create one or a thousand if you so desire.)
that's just one way to do what you want. i tend to play that way a lot. i build up about 20 years ahead on my .csv to text file, saving each year's players in a separate file ... so it only takes a few minutes to import them.
http://www.ootpdevelopments.com/boar...xt+file&page=2
posts 8 and 11 are most relevant on how to create the text file.
hope this helps a bit and doesn't confuse.