which site are you trying to upload it to?
i'll try to help you.

i mean, what image hosting site. like photobucket and tinypic.

i jus did it wit paint shop

To upload...you go to www.tinypic.com or www.photobucket.com.

Try tinypic..you don't have to sign up or anything...

well upload it, then go the the signature section on your profile edit thing..then click the little picture of a tree [i think it's a tree] and paste the link....then save it =o