One of the things that has always bugged me with pants in SL is that when I am wearing them with shoes with no socks, the inside of the pant legs are always flesh colored. Yuck. So I decided to take Chips templates and see if I could torture a special type of sock out of them. Actually, I almost re-invented the wheel as for some reason I thought his lower body template was just for pants for some reason. Doh! Doh! Doh!

So, here is the sock. Actually it is just the image for the sock, because all it is, is a white image with an alpha channel.
To use:
Create a new sock under Appearances and call it something like Inside Pant Leg
Set the height to anything (it doesn't matter)
Set the image to IPL - Final.tga
Then make the color a slightly darker shade of color of pants you are wearing
Tada!