There are many zip tools available. This example shows how the program WinZip makes it very easy to create a single zip file containing multiple image files. This is the preferred way to send multiple resized images to the webmaster. A zip file can be uploaded to the web page very quickly such that each individual image can be opened and uploaded in one step. If you are not sure if you have such a tool, search you computer to see if you have a zip program. If not, there are usually free tools available for download from various sites. Many have a free evaluation period which allows you to test a number of different tools and only pay if you find something you really like and want to pay for! WinZip is available at this site:
Winzip at Download.com


Other popular download sites are:
Tucows
ZDNet
WinPlanet
Shareware.com
FreewareFiles.com
Free Downloads Centre