Does everyone have the fsuipc file ad-on? I am new to FS so I do not know everything about the ad-on experience. Does fsuipc help to enable and or run ad-on aircraft for FS 2004?

Short answer is yes, install FSUICP. Without Peter's module, many add-ons will not/may not work at all in FS. FSUIPC has been around for years, and is a must have, and the FS community will always be forever indebted to his work.After a while, you may want to consider the payware version, (which adds many various options to settings within FS), but the full program is not required, although you will find the module itself will be, and is available for free.