You can manually change the repeat count of an IR code string by changing the digit just after the carrier frequency. For example, if your code is:
sendir,2:3,1,38000,1,1,343,170,22,19,22,19,22,19,22,63,22,63 ,22,63,22,63,22,19,22,63,22,63,22,63,22,19,22,19,22,19,22,19 ,22,63,22,63,22,63,
You would change the first digit to the right of "38000". So, you would change the 1 to a 2 or 3.