No problem. But remember that not all PS1 games work with the homebrew PS1 emulator. Also some don't have sound and/or lag too.
There should be some sort of password onthe page that you downloaded th emulator. Otherwise try googling the app and finding a different place to download.
theres no pass on the page from what i can see, and this is the site i downloaded it from: http://www.psp-hacks.com/file/812 i downloaded it before from QJ and got a password prompt as well