chevy454, if you type in opera:config into Opera and click Go, it will take you to all your Opera settings. Under User Prefs, you can see and set the location of the cache. You can also check out others settings with opera:config and set them to your personal preferences.
You can use ClearTemp to clear most of the common files by checking off the boxes for everything you want to clean on the main cleaning screen. As far as setting up ClearTemp to clean specific folders, it's easy and up to you what folders to clear. Just remember once you go into ClearTemp's main settings, then browse and set the specific folders to clean, that you click on the menu button at the bottom and save your changes. Check out this link below for some folders that I clear on the Diamond as well as other Main Storage management tips. Please note that the TP2 has much more Main Storage than the Diamond, so you will not need to manage the storage of specific data or cache files nearly as much. Heck, I would not worry about it much at all with TP2, unless you're getting close to critically low on Main Storage for some reason, like storing attachments, videos, and photos to Main Storage. If that's the case, just make sure to move your existing ones to your storage card, and then set them all up in their specific settings area to be stored on your storage card from now on.
http://forum.ppcgeeks.com/showthread.php?t=111584
Hope this helps...
R