I'm not support, but I think there is a setting in WB to not use a wallpaper should a Blind come with one. First of all are you using the Trial version? I'm assuming you are. If you bring up the WB configuration screen (the main page) and look to the left for Basic Settings. Select it and then look under Enhance Desktop elements and uncheck Apply any wallpaper supplied - that should fix your background problem. I'm assuming this option is available in the trial version - I haven't looked at it in awhile.
As to the Icon font problem you mention, there may be more than one way to solve this. I've tried two different approaches. Since I'm an OD 2007 customer, I know I can download and use IconX. IconX gives you a great deal of control over the Desktop Icons and their display fonts. You have to learn how to use it of course. Maybe the WC staff know if you can have this for free as well, you might need to be a WinCustomize member to have it. The other approach is to create a custom display setting in XP (right click the Desktop and select properties). You then select appearance, advanced, other advanced controls. If you look under item you will see Desktop displayed with a drop box arrow - click it. Scroll down one to Icon. You will then be able reset the Icon font size. When you are done resave your new theme. When Windows starts, after everything is loaded just reload your new theme. Make sure everything is just as you want it when you create it and you will have everything working just the way you want it. I hope this helps.