Combine Rows In Search Result

In Sql Server 2005 Express I have this table:
CREATE TABLE [dbo].[Sections](

    [SectionID] [int] NOT NULL,

    [DocumentNo] [smallint] NULL,

    [SequenceNo] [smallint] NULL,

    [SectionNo] [smallint] NULL,

    [DocumentTypeID] [smallint] NULL,

    [SectionText] [ntext] NULL)


 Each paragraph of text (SectionText) is in its own row
(SectionNo)  Each primary document has a DocumentTypeID of 1 with
three subdocument types (2=Index,  3=Background, 4=Report).
I run this query and return a collection of single rows from various documents grouped together by DocumentNo: 
    SELECT *

    FROM Sections

    WHERE CONTAINS (SectionText, 'exercise')

    ORDER BY DocumentNo


For each row that contains the search term, I would like to
return the full document (all rows as parapraphs within one row of
returned data).  In other words, I want to reconstitute the full
document as it existed prior to being inserted into the database with
paragraph separation.
For exampe, if the search term is in row 3
of DocumentNo=5, DocumentTypeID=2, I want to return all the rows of
that document in one block of text that retains paragraph format
(preferablly with a line break and carriage return between
paragraphs). How can this be done?