Here's a couple of tips regarding the blocking of DIVs if anyone is interested. If you want to create a filter that will only match DIVs then start your filter with:
/#DIV.*
For example /ad/ will block all the ads on www.wininformant.com (not a recommended filter, too many false positives) but /#DIV.*ad/ will only block the DIV ads.
If you want to create a filter that never blocks DIVs then end your filter with:
.*[^)]$/
For example /ad/ will become /ad.*[^)]$/ and will block all the ads on www.wininformant.com except for the DIV ads.