Install Permissions Problem

Hi, is there a way to get around changing the file permissions for installation. Setting so much to 777 and 755 is a major security risk and is totally unnecessary... On most linux servers I host with these days, permissions are ran against the owner of the script and not against the group or world. Also, changing the permissions is a BITCH without access to shell...  So if anyone knows a way to bypass the file permissions checking during installation I would appreciate the tip! Thanks!

Sometimes we need 777, just because need perform and execute and save in these folders ..

and as example 777 for ffmpeg, just to able execute it.

But don`t worry - in all such folder just multimedia content - no exec - able files.

Most of php files that can be executed just in root