how do u make enter signs with PSP 7.0?

With this you are only limited by your imagination.
Select a size and decorate it to your liking.
You if want a header banner try 350(width)x300(lenght) when selecting size.
Decorate with brushes and effects. The key is to have fun as you do it.
Then you just save as a .gif , .png ,or.jpg

k.. thank u so much!!

do what Fallen said and then look for a tutorial in the Turtorial section for Splash Screen if thats what your talking about