So you have a brand new word press install sitting on one of our servers - you start to add a theme or a plugin and it throws an error back at you stating the file exceeds the upload size or something to that effect.
Thankfully there is a very simple fix for this:
Copy and paste these 4 lines into a new notepad file and save the file as php.ini:
max_execution_time =300 memory_limit = 1024M post_max_size = 512M upload_max_filesize = 512M
Connect to your cPanel account and upload the file to two locations:
/home/username/public_html /home/username/public_html/wp-admin
This will now give you ample file size to upload any theme you need for your site.