Sadly, you can't. This is only possible in the regualar sims2 as far as i know. the cheat
on the regular sims2 is this: on the neighborhood, shift, c, alt. type: boolprop
testingcheatsenabled true. hope it helps somehow... (this cheat has many many things that
are cool)

When you make the charecter just choose ether family, relashionship, riches, or popularity

I am a miss by the way!
you left something out!
when you make a baby, toddler or child simy you may notice that there aspiration is to
grow up. there is a solution:
on there 13th b-day (teen b-day!) as soon as the blow out the candals they get a movie of
them growing into a teen, as soon as this movie is over a choice will appere a choice of
there aspiration. Popularity Riches Family or Relationship!
soz this was soooooooo long but thx for sticking around and reading!!!!

by the way, what do you press after you put
boolprop testingcheatsenabled true?

IF you are reading ths go to this site:
http://uk.faqs.ign.com/articles/882/882222p1.html

that man has sumthing really cool on that site he wants to show you