I can't do it, I tried all of the above, but need simple explanation of what commoner said, please.

Please help me install this aircraft.
Fuel doesn't make a difference, tried flaps, tried no flaps.
It's the engines that won't come up to full power, oil pressure light stays on, and the revs won't go all the way up......!!!
I'm so frustrated now, all the Lanc wants to do is plough fields....lol.
When I download the original FS2002 file, do I extract the contents to FS9 Aircraft folder or what?
Then when I install the update, where do I install that to? Do I change the folder where it asks you to install the file?
Please give me idiot proof info.
Thanks,
Tim.