How do i get the original skin back? I've deleted it because at first i didn't know how to install default skin so i installed a xml over the original. Is there a way to retrieve it?
I wonder how you deleted your default skin! You will have to reinstall the vBulletin now. You made a mess of your forum.
I deleted it because i installed another skin over it to make it default. I didn't know how to make default at first. Now i do. I doubt you need to reinstall i just need the original xml file.
All the files and images will be still on your computer. Use them from there. If you don't have them. Download the vB package again from vBulletin.com.
Do a backup first of your database. Also make a backup of database and files before making any changes in the future... it saves problems like this. For what it is worth, messing with the skins will not do anything to your posts or mods, though if you changed any of the skins to allow for mods etc then you will need to re-apply those. I would perhaps suggest making a backup of everything, especially your posts / database, then start from scratch and import all the old posts when you are done.