welcome to the site..
as far as modding the svt.. bolt on's dont do much.. SVT did a hell of a job squeeezing every hp out of it. I would recommend looking into seeing if the timing belt was done, then mounts, pretty much maintanance... doing a tune would be the best aftermarket mod to do. performance wise shy of going boost.
2000 Alpine White Turbo Focus
2003 Pitch Black SVT
Focus Revolution Club--Hatch Nation