Q242
Is there any way to Boost the Binder Level of a character with the Bind Vestige and Improved Bind Vestige, not including perhaps Bloodlines (though i don't know if that works with the Binding Feats anyway)?
Implements of Binding, ToM pp 76, give you a bonus on your Binding check, but do not improve your EBL. Bloodlines do not improve the abilities of feats, just classes.
If you took a level in the binder class and took the feat Improved Binding, your EBL for the purposes of the Improved Bind Vestige feat would be 8. (5th + 1 (Binder) + 2 (Improved Binding).
Everything else that I can see requires you to have the Soul Binding class feature, which the Bind Vestige and Improved Bind Vestige feats do NOT give you.
What exactly are you trying to accomplish?
Q244: Is there any kind of 'Evil Litmus Paper' ? A way to detect/prove an evil character whose alignment is hidden?
Uh... there's some prestige classes that just go 'no, anything that reveals alignment doesn't'. That said, if they just have a hidden alignment, Contact Other Plane is kind of a nice way to do it. Or, you could spy on them with scrying. Or, you could hit them with an MDJ or three and THEN go DETECT EVARL etc.