Ironman achievements give 1 point, regular achievements give 0,5 points. Also, there are guides for the achievements. (the link to 1 such guide in this post had a 404 error -_-)
just checked around and found this post and pretty sure u get both if u do both, like normal and then iron man not sure tho.
ive gotten pretty much all the achievements more than 3x now when i at 1st didnt know about the profile save and then when i couldnt use it, so like many im always looking to get a %100 achievement profile save with the current version i download. :)
(also where is the current save file folder supposed to b since its not in the game folder anymore)