Here is the easiest way, and the way i do it:
1. go to your object maker, make your own group (lets say you will name the group: MyMeshes) and put any of the meshes you want to give away in that group
2.go to your objects folder (Not my_objects) and look for the name of you group (it will look like this: MyMeshes.object)
3. Right click on it and put your mouse over 'Sent to' then click on 'Compressed (zipped) file'
now there will be a zipped folder, you can now upload it to mediafire!
hope that helped