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                                                                   EXHIBIT 99.29

                       SUPPLEMENT TO AMENDED AND RESTATED
                       MASTER SECURITIES PLEDGE AGREEMENT


This is a Supplement made as of May 31, 2001 to the amended and restated
securities pledge agreement made as of June 7, 1999 by certain persons to
Canadian Imperial Bank of Commerce, as Administrative Agent (the "Pledge
Agreement"). The provisions of the Pledge Agreement shall apply, mutatis
mutandis, to this Supplement. Capitalized terms used but not otherwise defined
in this Supplement have the meanings specified in the Pledge Agreement.

For valuable consideration, each of the undersigned (each a "New Pledgor")
severally (and not jointly, or jointly and severally) agrees with the
Administrative Agent, for the benefit of the Administrative Agent and the
Lenders, as follows:

1.     Each New Pledgor acknowledges that it has received and reviewed a copy of
the Pledge Agreement and the Credit Documents in existence on the date of this
Supplement, and confirms that it is executing and delivering this Supplement to
the Administrative Agent, for the benefit of the Administrative Agent and the
Lenders, pursuant to Section 21 of the Pledge Agreement.

2.     Effective from and after the date this Supplement is executed and
delivered to the Administrative Agent by any New Pledgor (and irrespective of
whether this Supplement has been executed and delivered by any other person),
such New Pledgor is, and shall be deemed for all purposes to be, a Pledgor under
the Pledge Agreement with the same force and effect, and subject to the same
agreements, representations, guarantees, indemnities, liabilities and
obligations, as if such New Pledgor was, effective as of the date of this
Supplement, an original signatory to the Pledge Agreement as a Pledgor. In
furtherance of the foregoing, each New Pledgor severally (and not jointly, or
jointly and severally) as security for the payment and performance of the
Obligations of such New Pledgor (including any Obligations that would become due
but for any automatic stay under the provisions of the Bankruptcy and Insolvency
Act (Canada), the United States Bankruptcy Code or any analogous provisions of
any other applicable law in Canada, the United States of America or any other
jurisdiction) hereby assigns and pledges to the Administrative Agent, for the
benefit of the Administrative Agent and the Lenders, and grants to the
Administrative Agent, for the benefit of the Administrative Agent and the
Lenders, a continuing security interest in, the Pledged Collateral of such New
Pledgor.

3.     Upon this Supplement bearing the signature of any person claiming to have
authority to bind a New Pledgor coming into the hands of the Administrative
Agent, and irrespective of whether this Supplement or the Pledge Agreement has
been executed by any other person, this Supplement will be deemed to be finally
and irrevocably executed and delivered by, and be effective and binding on, and
enforceable against, such New Pledgor free from any promise or condition
affecting or limiting the obligations of such New Pledgor and such New Pledgor
shall be, and shall be deemed for all purposes to be, a Pledgor under the Pledge
Agreement. No statement, representation, agreement or promise by any officer,
employee or

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agent of the Administrative Agent or any Lender forms any part of this
Supplement or the Pledge Agreement or has induced the making of this Supplement
or the Pledge Agreement by any New Pledgor or in any way affects any of the
Obligations of any New Pledgor.

IN WITNESS OF WHICH this Supplement has been duly executed and delivered by each
New Pledgor as of the date indicated on the first page of this Supplement.


                               3055851 NOVA SCOTIA COMPANY


                               By:  _____________________________
                               Name:
                               Title:


                               3055852 NOVA SCOTIA COMPANY


                               By:  _____________________________
                               Name:
                               Title: