Hi Peter,
I have a 400d and I just use the EOS software that came with the camera however I just thought that maybe I can not answer your question. I can only use EOS to set the shutter to 30' than I have to maunually turn the knob. I was going to add which I will anyway a link to a programable remote that allows me to set the number of exposures so I can walk away from my set up and it will keep shooting.
http://stores.shop.ebay.com.au/dslrb...34Q2ec0Q2em322
Mark