Hello Elijah,
I have looked about for abit and alot of people (including ifixit) have said that the lcd and screen are inseperable. You can however buy the parts seperatly, but there dosent seem to be anywhere with a guide on how to stick them together.
It also seems that you can buy them together (pre-stuck) for just a little bit more money.
So it is probably possible, but to complicated, not worth the time, and near enough the same price.
[guide|3562|You can view the teardown for the 4th generation ipod here...]
Hope this helps :)