It's OK being a crap amateur - were not all of us, or still, once?!
Go to Microsoft.com/Games and FS2000. You will need the new Patch - a must - If you bought PRO get that one - if you bought Standard get that one. One will NOT work in the other. This will correct the backcourse problem - though of course it should not be used, leastwise over here, double leastwise, it wasn't when I retired nearly three years ago! And it corrects many other things including the ILS problem you describe.
On Turbine's problem, bet you got a Voodoo or TNT! Anyway, invest in a Matrox G400 16, or 32mb - it's like it was made for FS. On FS98 I get frame rates of up to 90 and on FS2k I get up to 60-75.