I heard he eats small chihuahua's too.

I heard that too.  Call the Times.

You can find the triplets and quads mod at http://www.simbology.com.

The "reticulated spline" thing is just some silly part of Sim lore.  It dates back to Sim City 2000.  I'm sure there's some basis for it somewhere in some bit of code that only the original coders will ever understand.  The term is something of an oxy-moron...in that a spline is a mathematical term to describe the the piecewise joining of several low-order polynomial curves to approximate high-order complex curves.  To reticulate is to break up or divide into segments.  

It's just one of those nerdy inside-jokes that only a programmer could love.  Don't lose sleep over it.

Holy, screenage, Batman.  A guy at work got one of those and is required to wear SPF50 before turning it on :^)

You can use the InSIMenator's Family Tree to rejoin him to his parents.

If you use InTeen, you'll need to get an InTeen compatible copy of Pets SP0 Job Fixes from the InTeenimater website - or you'll get this error.

You can terminate the pregnancy of any sim with InTeen...not just teenagers.

Here's my urgent answer *insert indecent gesture*

Very likely you picked up an infected lot.  Lots you get off the Exchange are frequently tainted with bits and piece of mods and hacks.  More often than not, these hacks are equally incompatible with your game and the source of great headache.

I'd strongly suspect the lot.  You can use Sims 2 Clean Installer to browse your downloads and lots folders looking for content that is highlighted in red.  Red package files indicate a file that is changing the behavior of your game.  If you see a package in red that looks like ff35b35abc895db5bbdaa59682fe.package, it is likely a stowaway and you should disable or delete it.

There's an InTeenimated version of the Pet Job fixes here:

http://box156.bluehost.com/~aestudi1/forums/inteenimater/viewtopic.php?f=15&t=322

You have mod conflicts.  Dump your Downloads folder.

You have to open the neighborhood in SimPE and edit the Family/Household record in SimPE (under Tools | Neighborhoods | Neighborhood Browser...).  Then click on the Family Information records (FAMI) and find the entry you want to change.  Edit the name.  Commit (this is important or your changes will be lost!).  Save.