So I've currently only got the base game on my computer, and wanted to replace all of the clothing with completely different meshes and textures. I was wondering if this was possible, because I know nothing about meshes or CC creation in general (and Google only showed results for changing clothes in game). Any help is appreciated!

I made a default replacement tutorial which can be applied on clothing as well. if you do need some help in applying the tutorial for CASparts, let me know! But it's the same progress.

If you want some tutorials about clothing creating, I got a video tutorial as well that you can follow if you like.

Default replacement tutorial: http://modthesims.info/showthread.php?t=579498

Clothing tutorial: http://modthesims.info/showthread.php?t=580636

Thanks for the reply! I'm looking over both now. Kind of curious why Google didn't bring the tutorial up, but at least I can bookmark them. :>

Yeah the not-outdated/great tutorials to follow are really hard to find on google these days. That's why I uploaded the tutorial not only on my tumblr, but also here, to hopefully make it a bit easier for people to find. >-< Oh well...