Hi,
The first message indicates that your php.ini settings are two low. You can ask your hosting company to increase them and then it should work.
The second message indicates that either you didn't provide the correct folder for the install from folder process, or that you didn't upload all the files and folders of the install package in the folder that you specified (you need to extract the files on your local computer and then upload them to the tmp folder, if you upload the zip in the tmp folder, it won't work).