Plasman and Evan, if you are just talking the louvers on either side then I suggest you get lexan in strips and louver them as well for heat dissipation kinda like the Av. My G spyder bonnet however has the louvers formed as part of the shell itself - not removable - so they'd have to be physically cut out of the bonnet. For me, that's a major and non-OEM change that I'd never do, but I think it could be done and if done right and by a skilled hand it would look pretty cool. On my Diablo, the louver assembly is aluminum and is riveted in so it could easily be removed, set on my shelf, lexan fabricated, and replaced in a completely reversible mod. Regardless, I'd never do that to my Diablo either as it is intended to stay all OEM. If you do the mod, post pics!
On a side note, if you are already going to cut up the bonnet you might consider adding one in the center as well as the louvers. Adding more heat-dissipation to the G Spyder would be a very helpful mod aside from the cosmetic look of seeing your engine. You'd have to consider weight, attachment points, possible water intrusion into areas not originally intended for water or rain, flexing/rigidity, paint correction around the cuts, possible gasket around the new lexan assembly.