there's a 'way' to get them all, but i have not done such a thing.
this link shows how to create a txt file with a list of historical players for import before you schedule an inaugural draft as they'll be added to pool once you create it.
http://www.ootpdevelopments.com/boar...02&postcount=2
and, an older thread, just in case it has some tidbits of use:
http://www.ootpdevelopments.com/boar...69&postcount=6
"all" would be too many, of course. but, if you want it? if there's not an 'all' option/checkbox in the import window, you'll have to make a txt file with all the id's. maybe some cut/paste from existing historics db files could make it quick and easy to get them all? i'm sure there's a way to make it easy to accomplish.