SimConnect for dummies?

[deimos256]

I have been having a FSUIPC issue and I was told that the possible issue is that my SP1 libraries are missing, which means I possibly have a bad installation. I am running FSX accel and have been running this install for a couple years now with no problems until I bought an addon that required fsuipc 4.5.3. Could someone please explain what simconnect is and perhaps help me find out if i indeed have a corrupt install or it can easily be fixed. Thank you greatly in advance.

[deimos256]

well i managed to get simconnect installed from the release version, sp1a version and the accell/sp2 version and still having fsuipc issues. I ran fsx repair from the disc to no avail, im currently running accel fix from the disc as well. After this I give up.