The first one is unattainable in your situation unless you replace the whole motherboard. That's not an option because for the cost you may as well buy a new machine. If you buy an Overdrive chip you'll fall short of the first spec anyway, so let's deal with that in a minute. That is attainable. The best bang for the buck is always a memory upgrade, in my opinion, and it should almost always be a computer owner's first line of defence against obsolescence.
RAM is cheap.
It's the most cost-effective way to extend theusefulness of your machine. If you take only one piece of advice that I offer today, thenbuy as much RAM as you can afford and that your machinewill take. You won't be disappointed. I just helped a close friend setup a 486- 33Mhz machine that she inherited. That was good news because my friendwanted Windows 95, which, as a minimum, recommendseight megs of RAM and a 486-66 Mhz processor.