Here is a link to the web site with videos and user manual (written by a forum user) .
http://iscore.fasterthanmonkeys.com/training.jsp" onclick="window.open(this.href);return false;
focus on Version2.0 and later videos and the manual as some significant changes in managing substitutions from version 1.65. some pictures are for iphone and some are for iPad videos, but do not let that be a big deal, for the most part the two work exactly the same, Only a few minor differences. we can also help you in this forum.
To start in both ipad and iphone,
set up a couple test teams in Team Manager > Add Team > roster > Add players..
Try to set up a game, game Manager > add teams (home and away)> explore options .. then go back/save
Try to start a game, game manager> tap on game you set up above, > Line up screens come up (home and away). set player order, positions and bating status yes/no, when ready hit play / done.
When you are at the scoring screen, misc button (on bottom row) > show starting line up , brings you back to starting line up screen (but hopefully you do not need this as you got it right the first time)
also when in scoring screen, a tap on a fielder icon brings up the defensive substitution screen or a tap on a batter icon brings up the offensive substitution screen..