The center is easy to reach from much of San Antonio - maps and driving directions are below.
From 410-W (heading towards the I-10 interchange), take exit 17. At the traffic light, turn right and head north on Vance-Jackson.
From 410-E (heading away from the I-10 interchange), take exit 17. At the light, turn left to go north on Vance-Jackson.
The center is less than 2/10 of a mile north of 410. Heading north, go through the traffic light at Mossrock, and then turn left, onto the road just past the McDonald's restaurant. The parking area is the first lot on the right, about one hundred yards in. The center is in Suite 203, in the building to your right as you enter the parking lot.
From many areas north of the center, it may be easier to drive south on Vance-Jackson. Go through the signals at Jackson-Keller and Kerrybrook, turn right just before the McDonald's.
You can also use Yahoo Maps to find the center or to get driving directions.