Kind of a cryptic question but??
I would split the database into a front end (FE) which would contain your forms, reports, modules, etc., and a back end (BE) which would contain your tables. You can do this easily with the database splitter wizard. I would put the BE on a network drive and and copy the FE onto your users PCs. Use the Linked Table Manager to make sure that your users are pointing to the correct network drive where the BE is located. Also, make sure your users have the appropriate permissions on the network drive, read/write. Finally, make sure you are opening the database in Shared Mode, check this under Tools--->Options Advanced tab. That should get you started. REMEMBER to backup your database before you do anything.