Bios Mods -The Best BIOS Update and Modification Source

How can I see, which CPUs are supported in my laptop - a Lenovo 3000 Y410? I would like to upgrade the CPU to something > 2GHz, they are available on ebay for small money. According to the Chipset(GM965/PM965)- and CPU-Specs the y410 should be able to run T7300, T7500, T7700, T7800, T8100, T8300 and T9500 - all using 800 MHz FSB and having a TDP of 35 W, and possibly X7800, X7900 and X9000 using same FSB but having a TDP of 44W. However, I have no clue if these CPUs will be running in this strange BIOS - Is there a way to figure this out other than buying+trying one of these CPUs?

...also, it should be able to run T6600 and T6670, however, these CPUs are newer than the latest (and to the best of my knowledge only) BIOS Version. Does nobody know how to figure out, which CPUs are actually supported - and how the BIOS could be modified to support more CPUs?