I probably won't be over there at their house again until Monday.
Currently you will receive Zero Security Updates on XP SP2, MS support (KB, security updates) for XP SP2 ended over 18 months ago (I can't recall the exact date).
The installer notifies you if Java content is disabled in web browsers, and provides instructions for enabling it.
If you previously chose to hide some of the security prompts for applets and Java Web Start applications, the installer provides an option for restoring the prompts.
They did this for me with Windows XP SP2 when I was in a place where I could not get an Internet connection.
Of course, this probably won't work well on a regular basis but if you're in a standalone environment patches protecting you from Internet-based threats probably aren't high priority.
Even after that, the number of KBs would tax anyone on dial-up and manually downloading them (for off-line installation) would not be an easy task. free 18.5.2342/ Firefox ESR, u Block Origin, u Matrix/ Mail Washer Pro7.11.0/ Drop My Rights/ Win Patrol / Drive Image 7.1/ Snag It 10.0/ avast! Oh, my sister and brother-in-law's computer DOES have High Speed Internet. There is a link in there over at the right, which says, "You're welcome.