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OpenGL Particle from texture atlas

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I'm writing a particle system for an OpenGL ES 1.1 game and am using point sprites. At the moment I'm using a single 64x64 texture which is bound each time particles need to render. Is it possible to place the particle image inside a texture atlas so I don't need to bind another texture? How can I set texture coordinates for the point sprites without setting the s/t for each vertex? Is it possible to set the s/t for all point sprites? Is it possible perhaps by using the texture matrix? What's the best way? I am drawing them like so
	glBindBuffer(GL_ARRAY_BUFFER, m_verticesID);
	glBufferData(GL_ARRAY_BUFFER, sizeof(PointSprite2D) * m_maxParticles, m_vertices, GL_DYNAMIC_DRAW);
	glVertexPointer(2, GL_FLOAT, sizeof(PointSprite2D), 0);
	glEnableClientState (GL_COLOR_ARRAY);
	glColorPointer(4, GL_FLOAT, sizeof(PointSprite2D), (GLvoid*) sizeof(m_vertices[0].position));
	glPointSizePointerOES(GL_FLOAT, sizeof(PointSprite2D), (GLvoid*) (sizeof(m_vertices[0].position) + sizeof(m_vertices[0].color)));

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