Spurs rock
Believe.

Is UTSA playing in the Alamo Dome? If so, you can use the Alamo Bowl as the team's stadium. That's what I did with South Alabama since they play in the same stadium as the GMAC Mobile Bowl in Mobile, AL.

You can make UTSA in that game just like I did with my alma mater South Alabama. There's a website on EA sports online where you can make the team, their colors, unis, and stadiums. Then once you play the game, you can upload them. South Alabama is scheduled to join the FBS/Sun Belt in 2013 as well and I uploaded them onto the Sun Belt in NCAA 11 and played about 9 seasons in the dynasty before being asked to join the SEC. It was awesome.