Yeah you sure can, there are a couple of ways...
There are some popular website already out there that have their own, so look around..
Search the site you want for a blackberry shortcut
Or you can make your own, http://www.jonathanhfisher.co.uk/b2/?p=15
Thats the site but im not sure if its the right page, Its blocked here at work lol. directions are on the site as well.
or you can go here and find some popular ones you can install.. ota