Assuming your using a single MDB file for data tables/forms/queries etc, both the MDB and the workroup MDW file would sit on the network share.
You then need a shortcut on the users machine with something like the following properties;
Please note these should be entered as a single line
Target: "C:\Program Files\Microsoft Office\Office\MSACCESS.EXE" "X:\MyDB\MyDB.MDB"
/wrkgrp "X:\My DB\MyDB.mdw"
Start in: C:\Program Files\Microsoft Office\Office
This assumes MSACCESS has been installed as a standard part of MS Office and that the DB (MyDB.MDB) has been installed to a network share mapped to drive X: in a folder called 'MyDB'
If you don't use mapped drives then the target should read
"C:\Program Files\Microsoft Office\Office\MSACCESS.EXE" "\\MyServerName\MyDB\MyDB.MDB"
/wrkgrp "\\MyServerName\MyDB\MyDB.mdw"
where 'MyServerName' is the name of the server
If you're using a 'front end'/'backend' split system (Forms/reports/queries etc in the 'frontend' DB and data tables in the 'backend' DB), the frontend DB would normally sit on the User's PC and the backend DB and MDW on the network share. In this case, the shortcut properties should be something like the following;
Target: "C:\Program Files\Microsoft Office\Office\MSACCESS.EXE" "C:\program files\MyDB\MyDB.MDB"
/wrkgrp "X:\My DB\MyDB.mdw"
Start in: C:\Program Files\MyDB
The 'frontend' would need to have a code module adding to link the two DBs togther (unless you distributed it with the connection already made) - see the MS solutions DB for a sample of linking front/back DBs.
Have fun
Andy