I WANT TO INSTALL WALLPAPERS AND THEMES. i HAVE A BB PEARL 8110 V 4.3. CAN SOMEONE TELL ME PLEASE WHAT i NEED TO LOOK FOR WHEN BROWSING AVAILABLE DOWNLOADS, SUCH AS WHICH SERIES IS MY PHONE AND IS IT SAFE TO INSTALL 8100 THEMES AND PAPERS ON TO IT. PLEASE HELP AS I SEEM TO BE GOING ROUND IN CIRCLES AND GETTING KNOWWHERE.!

first turn the dang caps lock off
second you download the themes (be it a zip file or an OTA link) for the specifics you listed...81xx (some may be more specific some not) 4.3
Wallpapers don't really matter

First, you want to have a memory card for storing all media like pictures, music, and ringtones.
You want wallpapers that are sized at 240 X 260. The same size wallpapers fit both the 8100-series Blackberrys as the 7100-series. Check out Wallpaper
You can download to a computer or go to the site with your Pearl and download pics directly.

Thankyou both for help on issues. What are dang caps? They apparently have to be switched off. Where are these and how do they switch off?