After taking a look at that, it seems it assumes I'm already hacking my PS3, which... I have no knowledge of how to do, as mentioned. Never got into that. Upon clicking the link for that guide...
• An exploited PS3 (JailBroken) on 3.41
• PC with Hex Editor Neo (recommended)
• The PS3 FTP Manager application by CJPC
• Filezilla (PC FTP Client)
Jailbroken? Exploited? What? And I'm definitely past 3.41, so that could be a problem. And I assume that "PS3 application" is something you can use with an... exploited, or jailbroken PS3?