π is "p," except in the same circumstances (i.e. after a nasal) that T is "d," in which case π is "b."
Yes, but only in the beginning of the word. If μπ or ντ (mp-nt) appears in the middle of the word, then mp is pronounced m-b (and not b) and nt-->n-d (and not d)
ος-Kampos (the plain) is pron Kam-bos
ή-Ekpompi (broadcast, transmission) is pron Ekpom-bi
However, if μπ or ντ appear twice, ad seriatim within a word, then they're pronounced as the english b or d
άς (Mpampas-dad) is pron babasΝτ
ά (Ntanta-nanny) is pron dada