RT Summerdresses is a quick project I did. It uses the TMBE Body and comes in 4 texture variants. It has kinda crappy UV maps and stuff since it was a quick project.
This mod has TBBP Support and Weightslider Support. TBBP needs a compatible skeleton, like XPMSE.
To get the stuff in-game, use the AdditemMenu mod.
NMM or MO: Install using the archive with the mod manager of your choice.
Manual: Open the file with your favourite archive manager(Winrar, 7zip, etc.). Extract the content to your Skyrim/data folder.
Reverse the installation process.