I did have T61. Being a thinkpad, you feel like you actually own a beautiful piece of a laptop.
As far as battery, you will never be satisfied as the average will be around 3 hours.
We all want the battery to last 12 hours, right?
I believe there is a new version of XP that has SATA driver built-in to the boot CD. I don't know about it - I only heard of it.
And the problem with your installation is the SATA driver.
Once you figure out how to get the SATA driver...
I have been trying so hard to get my laptop to display 1920x1200 on my external LCD = gateway FPD2485w.
Let me tell you this:
The gateway does work = 1080p with my PS3 via hdmi-dvi
And it works with I use DELL 9300 1920x1200 RIGHT...