Look at www.sunfreeware.com, they have pre-compiled versions of perl and other useful opensource apps in pkg format for easy installs. Although, if you are using this with mod_perl or other complicated setups it may very well be worthwhile to compile and configure it for yourself. You will need to setup your path to use the new version of perl and perhaps replace the /usr/bin stock perl exec with link to the new version so as not to deal with shabangs exec the old version. In Solaris 9 and 10 I think the stock perl for Solaris is built 64 bit.