How to install a Star wars battlefront mod like Weapons Reloaded tutorial

Hi.To get started, firstly have you patched battlefront? or is it battlefront 2?
If it's the first battlefront,then,follow these instructions.
1) Get the files you downloaded (imp.lvl,rep.lvl, csi.lvl and all.lvl) If you downloaded a folder,just cut out only the contents!
2) Go to C:\Program Files\LucasArts\Star Wars Battlefront\GameData\Data\_LVL_PC, find a folder called Side.
2.5) Just a Reminder: Back up your files in the Side folder.Just imp.lvl,rep.lvl,cis.lvl and all.lvl
3) Paste the files into the folder. Do not paste an entire folder into sides!
4) The files should be replaced/overwritten.So don't worry if they ask if you want to replace it.

Please contact me again if this fails. Remember that the mod does not work on multiplayer and Ice maps with the imperials vs alliance/rebels cannnot function, it will crash!!!!!

Thank you,
Hydro Hero (aka Zero-berg)