This one was written as a support program, for my patch.library.
PatchSupervisor patches the exec.library/OldOpenLibrary(), OpenLibrary(),
OpenDevice() functions and allows disk-based librarys to be expunged
(in other words: removed from memory), if no task uses it 
(Opencount is zero), but patches are still installed.
If the library (or device) is opened again, the patches will
automatically be reinstalled.

So this program may save you some precious memory
(arp.library needed on my system more than 150 KB before I wrote this
program), especially when used in conjunction with PatchSetFunc
(also available on Aminet).

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                   47      47 100.0% -lh0- 9622 Mar 29  1996 patchsupervisor/File_Id.DIZ
[generic]                 1128    2020  55.8% -lh5- 1f0b Mar 29  1996 patchsupervisor/PatchSupervisor
[generic]                 1842    3814  48.3% -lh5- 10d8 Mar 29  1996 patchsupervisor/PatchSupervisor.doc
[generic]                  419     724  57.9% -lh5- 5f46 Mar 29  1996 patchsupervisor/PatchSupervisor.readme
[generic]                   47      47 100.0% -lh0- 9622 Nov  5  1995 File_Id.DIZ
[generic]                 4739    8204  57.8% -lh5- 091f Mar 29  1996 patchsupervisor/libs/patch.library
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         6 files    8222   14856  55.3%            Apr 14  1996