Hey guys , I've beem searching the net but somehow i've not been able to find the exact answer and i know if i look a bit harder i can find it but i also know that a lot of experts or on gog who could just give me the aswer (please ;) )
So far i've concluded that the even more incredible machine is an expansion that also includes the incredible machine but then it gets confusing. I started playing this and found out that puzzle 26 and 27 already beat me so i started 10 levels of the incredible machine 3, but then I started another one (don't exactly remember wich one) but i had the exact same puzzles...
Could anyone enlighten me please?

TIM2 comes after TIM+TEMIM.
TIM3 is exactly the same as TIM2, except it's Windows based, and you can't run it with DOSBox. I don't know why they included it instead of TIM2.
Return of TIM: Contraptions is a remake of TIM2. The puzzles are mostly the same, but there are some new ones, and the graphics are different.
TIM: Even More Contraptions is basically TIM4.

Only Tutorial puzzles in TIM5 (Even More Contraptions) are TIM4 puzzles. Rest is different.

thanks a lot guys!!!!