you have a pic you'd like as you sig?
then go to edit profile and under Optional Information you see a box with Upload Custom Signature Image underneath it.
*click it*
see Upload Sig? browse and find the file of your 'siggy' and click open.
the file will now be in the box,click up load up sig
*click it*
now you get a page where it says Signature Image Uploaded! and shows your pic.
see the url between tags? you need to copy that whole line including tags.
go to this line(To use your signature, please enter the following in your profile) and click profile.
now you back on edit profile go back to the box above the Upload Custom Signature Image title and paste that url you copied there.
go the bottom of the page and click submit modifications
*click it*
now your sig image will be there,if you need someone to make a sig for you please check here The Official Signature Request Thread
I'm sure someone there will be happy to make a personal one for you.
I hope this helps