For what it's worth, here is my experience:
My perfs are pretty bad, as my windows run at 68% (I suck at tuning up stuff).
I had a P1.2-AMD/K7-RAID, 256 RAM, GF2, WinMe.
Run AH 25-30FR. (32bit, 1024)
Run IL2-FB good in 16K, 1024, all low details except object details to the max.
I went to P1.2-AMD/K7RAID, 512 RAM, GF2, WinMe.
Run AH 30-40 FR. (32bit, 1024)
I changed to a P1.2-AMD/K7-RAID, 512 RAM, ATI-9700Pro-total package, WinMe.
Run AH 40-60FR. (32bit, 1024)
Run IL2-FB good in 32K, 800x600, all details to the max except horizon distance to High except Max.
I also went to a computer shop, and the girl told me that a 2.1AMD would run better than a 2.6 Intel on the benchmark. Something I didn't know (if it's true). She advized me to check
http://www6.tomshardware.com for hardware benchmark comparisons.
I hope it will give some ideas to the computer-hardware challenged like myself
Frenchy.