Is stuffed. Please take a look and fix if you can. First off, it won't load the map properly in SRB2, but when you fix that, the start of the map isn't accessible (the start is behind the place where I put the Player Start thing). DBSRB2 doesn't report any errors.
http://gcfreak.sepwich.com/downloads/scr_giantscauseway.wad
http://gcfreak.sepwich.com/downloads/scr_giantscauseway.wad