Pass! Not quite sure how smilebox works.
If you go to
digiscrapdepot
and look on the left hand side you'll see search, You can either look through kits by theme or by the date added to the site (you can also search for a specific designer)
Once you find a kit you like there will be a link to click on to get to their website where you'll find the kit to download. Click on the download link and it will either download automatically or re-direct you to a file share site like 4-shared. Download the kit and once it's downloaded you will have to unzip it and then all the elements will be available for you to use.
Once you have your siggy made, save it as a jpg (or gif if animated) and upload it to a photo hosting site like photobucket and copy & paste the IMG code into your signature box on JM.