I think they went on to 7 string guitar from that album and on. The older records are tuned D# G# C# F# A# D# thus The Wretched spawn with a 7 stringer is tuned A# D# G# C# F# A# D#.

And regarding tabs check out www.riversofgore.com they have most bands and tabs for death metal + they are almost always correct. Otherwise I think metaltabs has a few as well that may be decent