Model Sizing And Effects

[tabasco sauce]

I have some fusion core tags and i would like to know a few things on how to edit them some

1. How to change the models size withought actually re-building it, i know its possible in halo 2 but i dono what to change in gurrila

2. Im trying to make the explosion more halo 2ish, in halo 2 the explosion has less smoke and the explosion is more of a yello color and shorter, i can change the color and the smoke, but so far ive only been able to expand the explosion upwards and not outwards