select YY.* from (
select XX.ItemID from (
select ItemID from Parts
where FromType = 6 and ContentID IN(select pp.contentid
--,xSubSection.value('@Edit','varchar(1)') Editable 
from parts pp
join (select Contentid, cast(config as xml) xConfig from contents) CC ON CC.ContentID= pp.ContentID 
outer apply xConfig.nodes('//SubSection') tSubSection(xSubSection)
where fromtype in (2,6) 
 and isnull(xSubSection.value('@Edit','varchar(1)'),'N')='N'
group by pp.contentid
having count(*) > 1) ) ah
Cross Apply vefn_SiblingItems(ah.ItemID,null) XX
Join Contents CC ON CC.ContentID=XX.ContentID) AH
Cross Apply vefn_FindExternalTransitions(ItemID) YY