How to make a dream avatar, I'll just make this blog and you can follow these instructions:
1) Open up google chrome. (Why wouldn't you have it open anyways, it's the best haha)
2) Now you have to find the designs you want to try, usually looking on shops, auctions, or through people's gifts will get you there.
3) Right click on the image of the design and open up inspect element. A small bar that takes up about 1/4th of the screen should come up from the bottom.
4) Then you copy and paste the "http" of the design shown on inspect element by double clicking it and copying it. It looks like this: http://i46.tinypic.com/219nt5t.png
5) You also have to remember the usually 6 digit number which is after the "id" on the link to the image at the top of the site. It looks like this: http://i49.tinypic.com/3010pso.png
6) Now with these two things you go to where you dress your own avatar, right click on any one of your designs, and using inspect element again, replace the "http" and "id" of the design you already own with the "http" and "id" of the design you want to test on, but make sure the "type", located just before the id, is correct. If you're testing on a hat/hair ornament it would be "type-hi", a skin/tattoo/scar "type-s", a shirt/piece of clothing "type-c", a mouth "type-m", a hair "type-h", and eyes "type-e"