hello
here is a small tutorial for beginners starting or learning how to upload:
first start by opening bodyshop you should see 2 section in the menu

create or clone sim or pakage sim click package sim

enter file name and description
next determine if you want to rar or Zip the package sim (*the file should be on your desktop)
next enter insim or other site when it comes to uploading you should see this screen

then you pickup the files see picture for ex and then when you have your files or picture click upload.

end voila you are done if more help is needed just post in the help forum.
Ps:Before attaching files you should enter this screen or click the post reply button

write your thread then click manage attachement button see picture

select file that you have rar or zip see abve pictures for explanation and voila you just have to upload your file do not forget to add pictures of the sim or clothes that you are uploading and hope this tutorial helps everyone.