Go to User CP at the top of page and Edit signature, this allows you to customise your signature.
Sorry couldnt help with your flash issue. On mine the flash settings change with different modes selected, assumed it would be same on yours.
__________________
Pentax K20D| Sigma 18-55mm, Sigma 70-300mm | SMC Pentax-A 1:2 50mm | Misc Filters
|