Here is the compatible list to check: http://www.tp-link.com/resources/document/TL-PS110U_Compatibility_List_2.pdf If the printer is in the list, then that should work, if not, it will take risk.

http://www.tp-link.com/en/article/?faqid=252 At the last part of this instruction shows how to set up the queue name on the MAC computer. Maybe it will help.

As far as i know, you can use the storage sharing and the printer server through USB port at the same time.

The 2.4g and 5G are both for wireless traffics. But all your connection for the devices are using cables. As far as i know, the 2.4g and 5G are separated already. If your PS3 is connected to 5G...

How about use this instruction http://www.tp-link.com/en/article/?faqid=420

There is no lights even the power? If there is no power, then nothing can do but the warranty. If it is the middle light, you can reset it by the CD utility and then check whether it will on or not....