Ok, long post time.
First here's the fixed text from the computercube: http://pastebin.com/QJguHwFu
Minor changes mostly, and I beleive I didn't mess with the syntax, so it should re-compile fine.
Second, I did some minor fiddling with the textures of your blocks to make them a bit "softer" in the eye. Given the changes are very minor I don't see a reason to bother making this a separate texture pack. If you like them and would like to use, they are provided 100% free to use.
Third, I'd like to suggest a "palette" add-on to the reactor simulator. Cycling through each component when placing them is a bit of pain, so what about adding something like this to the planner?
(very bad photoshop mockup)
Also have you considered adding some gregtech super heat exchangers, platings and vents? Given how much heat plutonium produces it is quite tricky to make a stable reactor with it.