What you could try:
Make the background/rectangular first and save it as PNG.
Open a new file (500x300 or whatever size, transparent) and just drag the background onto it. You can place the render after that any size you want. (Hope I made sense! o.o)
[MENTION=5445]nawi[/MENTION] ; Ok, lemme know if you need help ^^
And yea transparent. Cuz if you use the normal white, you end up with a white background even if you save it as PNG.
The empty parts (non filled parts with your signature) will stay transparent that way.
Shine, can you update your RJ01314344 to the latest version? It adds the scene gallery and your current links are close to be 1 year old anyways (they will probably expire in february).
Some other users are looking for it too, thank you!