Ok I think I found out my own answer to this question so I am posting my findings. I have found out how to cause that new yahoo 10 to be skinned by windowblinds 7. It is quite simple, all i did was go to start menu, then to programs, then to my yahoo folder, then I right moused clicked the yahoo icon, and then I clicked on compatablity tab, and then I checked the box next to disable visual theme, and then apply, and that cause my yahoo messener version 10s interface to be skinned by windowblinds 7
I hope this helps other yahoo messenger users.
firstliight