What TalismanRich said. Also, there are other VSTs, e.g. SIR, that use impulse files. You insert the VST on a track, then import the impulse files into the VST.
SIR:
Download Free Convolution Reverb plug-in: SIR by Christian Knufinke Software
Not quite sure how I load the impulse file into a vst...sorry, all new to me.