a couple of suggestions,

You will want to compile and install the perl distribution yourself since if you just pull down a binary from somewhere it might have incompatibilities with your system. Usually the perl Configure script will choose the best choice for your system, so for the most part it's not a difficult installation.

As for compilers, HP-UX 10.20 should have CD's that you can install software development packages from, including (if i remember correctly) gcc and ansic. These will install into /opt by default. If you don't have these distributions and can't or don't want to pull down and compile them yourself than you will probably want a precompiled perl.

If you sit down and go through the perl install with a proper compiler it should take no more than an hour (that's about how long it took for a s700 running 10.20 here)...

jynx

ps hope this helps; and if you want a documented procedure i've gotten one written up somewhere around here, i can't guarantee it'll be better than you've seen already though...