<PAGE>   1
 
                                                                   EXHIBIT 24.01
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of: December 12, 1997                 /s/ RICHARD E. RAINWATER
                                               ---------------------------------------------
                                               Richard E. Rainwater
                                               Trust Manager and Chairman of the Board
</TABLE>
<PAGE>   2
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of: December 12, 1997                 /s/ JOHN C. GOFF
                                               ---------------------------------------------
                                               John C. Goff
                                               Trust Manager and Vice Chairman of the Board
</TABLE>
<PAGE>   3
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of: December 12, 1997                 /s/ GERALD W. HADDOCK
                                               ---------------------------------------------
                                               Gerald W. Haddock
                                               Trust Manager, President and
                                               Chief Executive Officer
</TABLE>
<PAGE>   4
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of December 12, 1997                  /s/ DALLAS E. LUCAS
                                               ---------------------------------------------
                                               Dallas E. Lucas
                                               Senior Vice President and Chief Financial
                                               Officer
</TABLE>
<PAGE>   5
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of December 12, 1997                  /s/ ANTHONY M. FRANK
                                               ---------------------------------------------
                                               Anthony M. Frank
                                               Trust Manager
</TABLE>
<PAGE>   6
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of December 12, 1997                  /s/ MORTON H. MEYERSON
                                               ---------------------------------------------
                                               Morton H. Meyerson
                                               Trust Manager
</TABLE>
<PAGE>   7
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of December 12, 1997                  /s/ WILLIAM F. QUINN
                                               ---------------------------------------------
                                               William F. Quinn
                                               Trust Manager
</TABLE>
<PAGE>   8
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of: December 12, 1997                 /s/ PAUL E. ROWSEY, III
                                               ---------------------------------------------
                                               Paul E. Rowsey, III
                                               Trust Manager
</TABLE>
<PAGE>   9
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Gerald W. Haddock, John C. Goff and David M. Dean, and each of
them, as his true and lawful attorney-in-fact and agent, each with full powers
of substitution and resubstitution, for him and in his name, place and stead, in
any and all capacities, with full power to act alone, to sign any or all
documents (including both pre- and post-effective amendments to this
Registration Statement on Form S-3) and to file the same, with all exhibits
thereto and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto each said attorney-in-fact and agent full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as each said attorney-in-fact and agent might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or
any of them, or any substitute or substitutes for any of them, may lawfully do
or cause to be done by virtue hereof.
 
<TABLE>
<S>                                            <C>
Dated as of: December 12, 1997                 /s/ MELVIN ZUCKERMAN
                                               ---------------------------------------------
                                               Melvin Zuckerman
                                               Trust Manager
</TABLE>