Help with MODS

Hi, everyone. New here, and new to modding. I do have a talent in programming and enough knowledge to be dangerous. For Baldur's Gate and WeiDU, I have, really, 0 experience; but, I have scripted AI files for myself for several years, and they work well. So, I'm far from pro, but competent.

I am attempting my first mod, which is to include a new character, "Vondo", into the game. It has been a struggle as I had no idea what WeiDU was or how to use it, but I'm catching on quickly.

I think I'm getting it, and I think I'm almost done with this mod, but I have one problem:

Running WeiDU (even as administrator), I am receiving the message that permission is denied to dialog.tlk -- I am running Vista, but I am NOT installed in the "programs" folder and I have repeatedly ran system command attrib -r -s on both the parent folder and on dialog.tlk; the folder still has the infuriating "read only" attribute set, but the individual file does not.

Ideas?