To continue playing the match even after 50 overs, until all of your batsmen are out, start by batting first and playing through 50 overs. When you are done doing so, you'll have the option to Continue. Instead of doing so, choose the option to Save & Exit. Then load the game, then immediately Save & Exit again. Now when you resume the match from there, a "batsman" will bowl all the overs and will do so alone. There will be no other bowler. This setup allows you to easily score a bunch of points. Since you'll be doing a lot of playing, you'll want to make things easy on yourself with optimal match settings, and you should also turn off replays to speed things along.