[guillotmarc]

Hola

En concreto esta es la parte que te interesa (para Delphi 3)

Uninstall previous installed version of RX Library from Delphi 3 IDE.
Remove previously compiled RX packages RXCTL.DPL, RXDB.DPL, RXTOOLS.DPL,
DCLRXCTL.DPL, DCLRXDB.DPL and DCLRXTLS.DPL from your hard disk.

Use "File\Open..." menu item of Delphi IDE to open consistently RX
run-time packages RXCTL.DPK (MUST be first), RXDB.DPK and RXTOOLS.DPK.
In "Package..." window click "Compile" button to compile RX Library
run-time packages. Put compiled DPL files into directory that is
accessible through the search PATH (i.e. DOS "PATH" environment
variable; for example, in the Windows\System directory). After
compiling RX run-time packages you must install RX design-time
packages into the IDE.

Use "File\Open..." menu item to open consistently RX design-time
packages DCLRXCTL.DPK (MUST be first), DCLRXDB.DPK and DCLRXTLS.DPK.
In "Package..." window click "Install" button to register RX Library
components on the "RX Controls", "RX DBAware" and "RX Tools" pages
accordingly.

NOTE: do not save package sources in the Delphi IDE.

Saludos.