Anyone thinking this is going to 'FLY' with Windows7 and 'SCREAM' must have low standards. The Core Duo T2400 does not feature hyperthreading, or 64 bit capability. It is a 5+ year old CPU...
Basically, if you really want to increase the performance of this laptop, you should swap the tired hard drive (which, on a used laptop, is one of the first things to go anyways) with an SSD. I was given an old Inspiron 8600 (Pentium4 M 1.4GHz/512MB) whose performance nearly doubled when I threw in a cheap 32GB SSD from eBay. The problem was the price: $70. If you put one of those into this laptop you are in to it nearly $300, and you can get brand new laptops (sure, entry level) for that amount....Micro Center has in store pickup Toshibas and Dells for $280.
Of course, if the docking station is making the sale for you, it may be worth it, but decent USB docking stations can be had for as little as $50.