I'm going to say something that sound very brutal, but it is nevertheless true.
Despite the popular conception, software
does wear out. You cannot simply pay for it once and it runs forever.
Sure, the bits don't literally rot, but there is nevertheless rot, and it comes from the outside in. The hardware gets replaced, the OS gets upgraded, older software won't run under the new OS, frameworks become obsolete. I once had a project where a 2-line code change required me to install an obsolete version of Microsoft Developer Studio, install obsolete maintenance patches, and build an executable at 2:00 am. It was not fun and even less so because I very nearly had to install an obsolete copy of Windows and obsolete service packs just to be able to run the obsolete version of Visual Studio.
I have a stack of Pentium computers near my desk. They each have more processing power than the high-end IBM mainframe I used to support in the early/mid 1980s. But I don't power them up and use them, because they cannot run modern software. Indeed, they don't even have enough resources to run a
Java IDE on them. They'd waste more power operating them than they'd produce in value. In fact, the only reasons I don't scrap them is that I have some old peripherals that I'd like to auction off and I need the old boxes to be able to
test them. That and someone might someday be willing to pay me enough to do a project that, like yours, needs to run on antiquated infrastructure.
There comes a point where it's no longer cheaper to maintain a program than to upgrade or replace it. You've reached that point. It's no longer possible to hire a cheap consultant off the street to work with JSF version 1. JSF version 1 is just too different from JSF version 2 at the internal levels. JSF2 doesn't use JSPs or tag libraries, it uses XML View Templates. The only places you'll find people with that kind of expertise are people, who like yourself, are stuck maintaining obsolete software and therefore probably working too hard to be able to spare time for you or people like me who hoard old knowledge and charge premium rates for it.