[Avodah] Kaddish Yasom -- Misplaced Priority?

[Arie Folger]

RMYG wrote:
> This Yom Tov I saw a Rav allow an Aveil (who arrived late) to say Kaddish
> (IIRC, Shaleim) during Pesukei D'Zimrah (there had not been a Minyan
> present when the Chazzan reached Mizmor Shir).

??? AFAIK, only when a minyan participated in learning (beraita deRabbi 
Yishmael, for example) or reciting pessuqim can one say qadish. You might of 
course say that pessuqei dezimra constitutes the latter, BUT, those who do 
only have qadish after mizmor shir 'hanukat habayit, which had obviously not 
been recited in presence of a minyan. Furthermore, who says that we should 
insert that mizmor at all? The original minhag did not include it (and 
indeed, we don't say it). If its inclusion isn't definitely necessary, then 
the qaddish can't be, either, so how do we justify interrupting the holy 
pessuqei dezimra for qadish?

-- 
Arie Folger
http://www.ariefolger.googlepages.com