Bring Generic Archer to BGEE

Was wondering if anyone knows how to get the generic archer (from the tactics mod) to work in BGEE. Tried to install it but it wont work. Would anyone know how to implement this kit as its the only way you can multiclass a decent archer as rangers only multiclass with clerics. Failing that if anyone knows how to multi class a ranger with a thief that would be even better (favorite class). Cheers any feed back would be appreciated