No problem at all...happy to help. With ghost-signed/secreterial autographs, a lot of it is doing research (either by searching in Google images, or for certified autographs on ebay) to see what the signature is supposed to look like, and comparing it to whatever you got back in the mail. Also, message boards full of other collectors (such as Blowout, Freedom Cardboard, Pat Neshek, etc.) are helpful. Most politician autographs obtained TTM are either secretarial, or autopen (a device that affixes a replica signature on your item). Other athletes I've heard rumors of being ghost-signed in recent years include Ryan Zimmerman, Paul Konerko, Don Zimmer, David Wright. Some notable autopen responses come from Arnold Palmer and Wayne Gretzky. As far as pre-prints go, you can tell by tilting the photo under a light, and the signature is actually part of the photo (it's hard to better explain, but you can tell).
COLLECTS: -signed cards & 8x10s of all sports (esp. baseball, basketball, NASCAR, monster trucks)
-inexpensive cert cards from ALL sports
-1985 Fleer (539/660 signed; 90/132 Update signed)