You need to install the Display Name CSS item. Once you do this, it's easy
. Go to the Add/Edit/Delete Items section of the SMFShop admin, and add a new "Display Name CSS" item (one item for each different thing you'd like). For the CSS, these should work:
For Bold:
font-weight: bold
For underline:
text-decoration: underline
For strikeout:
text-decoration: strikeout
I wasn't too sure about the Glow, but a Google search shows that something like this should work:
filter: Glow(Color=#ff0000, Strength=8);
Hope this helps you