Friendlyquark, it's possible that you have an incompatible custom content who blocks the loading (such as a career or an hack). Try to scan your Downloads folder (with the Sims 2 Pack Clean Installer) and remove these files first.
I'm not sure but your system requirements are ok for the last EP (Free Time) ? It seem like a graphic problem :roll: but in any case have you try to play without your custom content ?
If there are dead Sims who are resurrected it's normal they have losted their memories and relationships. But the problem is that they died without anybody for their childs ?
I don't know for the price but a wed research could help you. For Vista try "Panneau de configuration" arf Configuration board (?) / System and maintenance / Windows welcome.
Some mods can be (sometimes) downloaded in houses without warn, so if you use the Sims 2 pack clean installer to install the houses it will be more safe too.