You know what would be a nice add-on? A patch that fixes most of the glaring bugs that appear even for people with high end cards. Bethesda needs to fix their shit before even considering addons.
Didn't they release a patch a few days ago? I didn't take it for a spin (yet), but from what I've read...things should be better now.
They did release it but it caused more problems and didn't fix some other glaring issue. One problem that arose from the new patch is insane mouse acceleration when in a menu screen and other things. Still did not fix the One Year Later crash or anything else that is mentioned in the forums.
I've got a Frankenstein PC here as well. Some parts are about 5 years old (hard drive and this Plextor DVD-RW)...others are recent (like this ATI HD4870 XT I gots me a few months back).
But on average...it's a pretty decent machine... Runs F3 at 1650x1080 at max details with no problem...and makes using the GECK a joy :)