the HIDs and fogs look good (8000K is way too blue for my tastes but they do look pretty lol), not feeling that rubber strip in the middle of the trunk lid though....seems like it should be along the trailing edge at the back of the trunk in order to be a trunk lid lip spoiler thingy
the battery relocatin is a good idea and I def. felt the difference at the autox course
as for your method of mounting the battery in the rear......you need a battery box with a vent tube around the battery in order to pass ANY tech inspections.....your best bet would be to ditch that POS wet cell battery and just go pick up a gel cell optima or some other brand of gel cell battery. that way you never have to worry about noxious gasses leaking into the cabin of the car (which will happen) and you don't have to worry about getting acid all of your trunk....its the safest setup with a gel cell
not sure if you read the threads on b15 a while back about the rear "strut tower bar" but there's no way to make a functional rear strut tower bar on the b15 chassis b/c of the placement of the tops mounts of the rear dampers.....your setup there isn't a bad idea if you're doing it for structural rigidity purposes (bracing that big ass hole in the chassis lol) but it definitely isn't going to prevent that rear struts from flexing under loads (which they really don't do all that much anyway b/c of the rigid torsional beam rear suspension setup on those cars