If anyone has trouble with the Epson Printer Driver accessing the Fine Art papers when creating a ICC Custom Profile through Color Shuttle, after much searching I finally figured out how this works.
In Page Set-up: Select Format for: Epson 3800, Select Paper Size: 8.5 x 11>8.5x11 (options) Select Rear Paper Feed
Then click ok which loads the driver. From the driver window you should have full access to all the Fine Art Papers and Platen settings.
This may have been obvious to plenty of others but it took me several hours to figure out.