If you purchase GTAIV off of Steam, it will be auto-patched to the latest version ( 1.0.7.0)
If you are looking for help installing LCPD:FR & ELS, follow this link to our friends over at GTAPoliceMods: http://gtapolicemods.com/showthread.php?2323-New-to-GTA-modding
Credit goes to PFCBarefoot
There is also a tool he provides that installs Both at the same time for you!
Hope this helps, and Happy Holidays
btw no need for the $5 lol