Unfortunately I don't know about any other modding projects of this game...
...but I have been thingking about one thing for a while: in the sequel, Strogov has a new appearance, whether is there a possibility to change the old Strogov model in DtS with the new one?
I'm only a translator, not a programmer or something...so I don't know the answer...but it would be cool!
The sequel begins with same video as the DtS finishes...It's a little strange, when Strogov appears in his "well-known" dull-grey clothes, but he has a totally new face...