EXHIBIT 3.6

                                    CHARTER
                                       OF
                                    DFI, INC.

         The undersigned, acting as the incorporator of a corporation under the
Tennessee Business Corporation Act (the "Act"), adopts the following charter for
such corporation:

         1.       The name of the corporation is DFI, Inc.

         2.       The corporation is for profit.

         3.       The street address of the corporation's principal office is:

                           3038 Sidco Drive
                           Davidson County
                           Nashville, Tennessee 37024

         4.       (a)      The name of the corporation's initial registered
                  agent is A. Chad Fitzhugh.

                  (b)      The street address of the corporation's initial
                  registered office in Tennessee is:

                           3038 Sidco Drive
                           Davidson County
                           Nashville, Tennessee 37024

         5.       The name and address of the incorporator is:

                           Kevin P. O'Hara
                           Bass, Berry & Sims PLC
                           First American Center
                           Nashville, TN  37238-2700

         6.       The number of shares of stock the corporation is authorized to
issue is 100,000 shares of common stock, par value $0.01 per share.

         7.       The shareholders of the corporation shall not have preemptive
rights.

         8.       To the fullest extent permitted by the Act as in effect on the
date hereof and as hereafter amended from time to time, a director of the
corporation shall not be liable to the corporation or its shareholders for
monetary damages for breach of fiduciary duty as a director. If the Act or any
successor statute is amended after adoption of this provision to authorize
corporate action further eliminating or limiting the personal liability of
directors, then the liability of a director of the corporation shall be
eliminated or limited to the fullest extent permitted by the Act, as so amended
from time to time. Any repeal or modification of this paragraph 8 by the
shareholders of the corporation shall not adversely affect any right or



protection of a director of the corporation existing at the time of such repeal
or modification or with respect to events occurring prior to such time.

Dated: December 10, 1997

                                       /s/ Kevin P. O'Hara
                                       ----------------------------------------
                                       Kevin P. O'Hara, Incorporator