This is the Razorback. It flies pretty well, except it can lose control when turning (if you take your hands off the controls it will regain control on its own though).
Your computer is about the same as mine, but I don't think I could run this craft. If after you are done, would you please share the craft file, for... science!
I don't think that is intake spam, intake spam is when intakes block each other and still work to the fullest. Anyways, that's a cool plane, can we get the craft file please.
I don't know if this is what you're looking for (it doesn't re-texture any thing) it puts the original parts back in the game. The parts don't appear in the new career mode, I'll update it eventually. Original KSP parts
Every thing you need is at Kerbal Space Program\GameData\Squad\Parts\Engine\ionEngine. You want to edit the "part" CFG file. You need to make a copy of the "ionEngine" folder and rename it to what you want. Also, don't forget to rename the "name = ionEngine" in the new part file, it needs to exactly match the name of the new folder. Look here for more help http://wiki.kerbalspaceprogram.com/wiki/CFG_File_Documentation
I don't know if you're going for realism or not, but the Space Shuttle's external tank doesn't have engines under it. It's only the SRBs and Space Shuttle main engines that lift it. Still, it looks cool.
If you mean multiple antennas, then it won't do anything, you only need one on each vessel. I still use multiple, for reasons! There is a mod that allows you set up communication satellites, but I don't know the name. Someone here will know.