I quickly downloaded the perl for psion file (Ah, the benefits of broadband access) and it seems genuine. Sadly I cannot run it as:

1. I have no Psion 5 (only Psion 3)
2. PsiWin is not installed on my Windows XP machine

I suspect that it probably does not include all modules which are normally included with a standard Perl installation.

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law