Improve framerate. help?

I'm no computer expert, and I need help upgrading my computer to handle FSX bettter. The one thing I can identify as the worst ( I think) is my Nvidia Geforce 6150SE nforce 430 graphics card.
Also I have:
AMD Athalon 64 X2 Dual Core processor 4400+ 2.30 ghz
2gb ram (and leaving a 2gb flashdrive on vista "readyboost")
Vista home premium 32-bit
Also if this helps here's my vista experience index:
Processor: 4.9
Memory (ram): 5.9
Graphics: 3.2
Gaming Graphics: 3.0
Primary Hard Disk: 5.6
What could I do to improve my fps (currently 4-5 on highest settings and 10-15 on lowest) in FSX for as little money as possible? thanks.
Also I have:
AMD Athalon 64 X2 Dual Core processor 4400+ 2.30 ghz
2gb ram (and leaving a 2gb flashdrive on vista "readyboost")
Vista home premium 32-bit
Also if this helps here's my vista experience index:
Processor: 4.9
Memory (ram): 5.9
Graphics: 3.2
Gaming Graphics: 3.0
Primary Hard Disk: 5.6
What could I do to improve my fps (currently 4-5 on highest settings and 10-15 on lowest) in FSX for as little money as possible? thanks.