It's nice that GOG is offering this game for people who don't have it. But don't forget that the bulk of the work of getting it running was done by the people over at ScummVM. The GOG version uses ScummVM.
Balmoral Software had a good list of puzzle solutions.
Even more important, it has lists of possible pot, lid, and Ixupi locations. http://balmoralsoftware.com/shivers/shivers.htm
I wouldn't recommend using it straight off the bat, but if you're absolutely stuck for where a pot, lid, or Ixupi might be and just can't find it, the Balmoral site is a great resource.