You COULD use Emashers Gascraft for this guys. The machines are GUI free, and no NEI recipes exist for it all(yet), but I can tell you, you need 1 pearl for one bit, but if you use Emashers Mods, you need that one piece anyway.
Take some water and sand and run 'em through a Socket with a Mixer and you get Slickwater. That slickwater isn't really needed, but helps with step two.
Step two is find a bit of natural gas shale down near bedrock(looks like bedrock but has green bits). Make sure you have a Fracker and it is on the bottom of your socket, and it pumps the silckwater in and gets you natural gas. Natural gas is great because you need it to get propellent, which is needed for for almost all gases in this mod. Send that gas into a refinery(BC works here, as does Emmashers one) and get Propellent. Now it gets complicated, you need Quicklime for the final mix here, and that requires a Kiln.
I can't explain that bit nearly as well as Emmasher himself, and
he has a wiki that has info on this sort of stuff. After that, you send the quicklime and propellent into a Mixer and you get Corrosive Gas. Be careful with it, it ignores gasmasks and
Instantly Kills Endermen with a 100% chance to get an ender pearl. Also great for getting wither skeletons if you use it on Zombie Pigmen, has a 100% chance to strip the flesh from 'em and a 25% chance for the resulting skeleton to be a wither variant. Used correctly this kind of setup doesn't even waste gas, but it'll take tougher blocks then netherrack I'm sure.