As I promised here is my very first video tutorial. Unfortunately I forgot to take a photo about the parts of the nappy. :S
This is how it looks now.
4. pin together the PUL and the lining part
Anyway here are the steps of the sewing:
3. sew FOE
0. cut the pieces (PUL + lining)
1. serging the lining parts
2. pin FOE to the lining parts
9. wash and use and wash and use and wash... :D