Shooting handheld panos indoors isn't impossible if you remember a few basic things:
- rotate around your lens, not yourself
- choose the widest-angle lens you own
- use Manual exposure and a tighter aperture (even using AF isn't bad in a small room at f/11 or more)
- overlap about 20-30% if you use an automatic stitcher like Photoshop CS4, Hugin, AutoPano, Stitcher, PTGui, etc. (At 50% overlap the software will see 3 images at the same point and throw up!)
- try to shoot blank walls straight on, with some details in each corner to match up other shots
That said, you already have some images you want to stitch. If you're using a stitching software that has variable blending methods, choose one called "Smartblend" which recognizes parallax and works around the bad parts. Photoshop CS4 and Autodesk Stitcher include this for sure.
See an example of Smartblend defeating simple parallax here.
If not, PM me and I can stitch pretty much anything if it is interesting and challenging. There's a reason my online name is "panoguy"...