What if I have all the Sims2 programs installed in my computer, from the original to the FFS EP, will this work if I download it and use it, even if I don't have the holiday pack?

Well, on XMsims.com, someone actually did upload an outfit of clothing for use with females that is similar to Nature Boy's clothing, but the only problem with that one is that they only made it for an everyday outfit.  It's not selectable for any of the other categories.  I did, however, leave a note of sorts asking if someone on the site could make the outfit for use in the other categories.  It is found under Fantasy on that site.  It's on page 2 of the Fantasy category on the site.

The outfits are nice, and so are the models for the outfits.  If it's possible, could you recolor some versions of this outfit to make it selectable as pajamas, undies, and swimwear?  That way, if people wanted to, they could have their Nature Boy, or Mew, Miewtu be in the nature boy type outfits all day long, during whatever activity they are doing.  If this sounds like a weird request, then you don't really have to try to make clothes for those categories, but it would be nice.