if its set in the alien universe, it don't make sence if the jockey lives when it was fossilized in the first film, unless its Another jockey and the race still exist, thats a totally differ story.
but if its a spinof, it can be either way. i mean, it can be a side story but still connected as canon to alien, but it can also be a totally seperate thing with justs hints of connection...which is it?