Hi, as you said SPARK is not yet compatible with SFML2. However it may be possible to port the SFML module for SFML2. Regarding your issue, if i understand correctly (you mean images and texts that are not particles ?), you can try to make a call to GLRenderer::saveGLStates() before the rendering of spark systems and and call to GLRenderer::restoreGLStates() just after so that OpenGL states wont be altered by SPARK (resulting in textures not being rendered in your case)
I know some users have already used SPARK with SFML2 but I think they have used directly the OpenGL renderers of SPARK rather than porting the SFML1 module.