The law that differentiates what is legal and what is not when making copies of a game has been in place for decades. That making your own copy of your own media is okay. However redistributing your copies to the masses is not ok. In fact its dangerous. Offering copyrighted material over the internet is in the grey area. If you want to take that risk, and you get in trouble for it, then its a matter of their professional 6-to-7 figure Jew lawyers against whatever lawyer you're able to afford.
Theres just no legal way to upload video games on any system in the US. Period. There are no loop holes, no gimmick. Its just straight up, black and white illegal, and that made up "delete it in 24 hours" excuse to ease other's conscious WILL NOT hold up in any court. While morally, both uploaders and downloaders are wrong/bad, legally, its the ones that upload, that offer content to the masses are the ones that grab attention, and people that profit from the distribution of copies will be in even more hot water.
Anyways, now that you understand that theres no possible legal way to host a site or upload copyrighted material on the internet without moving to another country and using their servers... here's what you can do...
Pay for your own server, your own site, and provide illegal downloads and hope you don't get in trouble.
Or find a pirate forum, and use file host sites to catalog a sea of links and multi-archives for a library of games for the masses of downloads.
Both methods have ways for you to use ad services and incentive programs to your favor where you're rewarded x amount of money for y amount of views/downloads.
The only legal thing you can do, is to make a thread post or site in a library/catalog-type format, documenting organized information and pictures of PSP games/releases. Much like GBATemp, there will be no download-links provided, just information that can help others pirate games.
Which doesn't really make sense that blatent piracy is not allowed, but somehow providing all the information and tools that are more-than-necessary to do so PLUS public discussions on it, somehow is legal? Its kind of two-faced and mixed-messaged.... "We don't condone piracy here, but here are a series of tutorials, how-to's, and more-than-you'll-ever-need-to-know to do so anyways." Sites like this are Hypocracy at it's finest.
Still... there is no legal way to provide download links to any copyrighted PSP games publicly. Any actions that you take that are infringing on copyrights publicly are both your illegal choice, and your risk.