Hey, Nahar! Don't worry, the HLP community is here to help.
First off,

Now, I'm assuming you have the latest release build and MediaVPs installed. If not, read
this thread and follow the steps there.
Now, once you have all that set up, download the Ridiculous campaign files
in the first post of this thread. Extract them (using a program like 7zip or WinRAR) into your main FreeSpace2 folder (they should extract themselves into a folder called "Ridiculous"). Next, open up your FS2 launcher, go to the MOD tab, and select the Ridiculous folder. Click "Apply", then "Run". Create a new pilot, go to the campaign room, select Ridiculous, and enjoy!
If you run into problems, post
in this forum and someone will no doubt help you out. Enjoy your stay!
Oh, it looks like the Shivans want to welcome you too:
