Well my sister told me you had windows 7. I have the same so I know how to. I told her how to upload the project

Step 1- Download WinRAR link- http://www.rarlab.com/download.htm
Click on the 1st one
then save it in your downloads

Step 2- Go to downloads and double click What you download then run it and follow the directions

Step 3- After that you need an account on MediaFIRE it is free

Step 4-Once you set up your account find you minecraft save.

Step 5- Once you find it right click and pick add to archive. then move the archived minecraft save and move it to the desktop
If you can't find your saves then go in your folders-go to computer and at the top type in %appdata%
Once you get to that find minecraft and you'll find saves

Step 6- Once you moved your archived folder to the desktop go back to mediaFIRE and sign in. You might need to verify your account.

Step 7- once your in click on upload-then from computer, go to your desktop and double click the archived folder. then click upload

Step 8-after return to your uploads and click on the one you just upload. it will bring you to a new tab with a download in the middle.
(KEEP THIS TAB OPEN FOR NOW)

Step 9- Go to planet minecraft and post your project
(VERY IMPORTANT-copy and paste the url at the top of the tab i said to keep open and put it where it says Download URL)

Step 10- Give your project a name and a description and your all good.

If your confused then look it up on youtube

this is the only way I know how to