The new skin file has more variables so you got to add them to the old skin file or do like i did, print the old file and try to edit the new one looking at the other, there's quite a few more variables in the new one........
about the stored procedures that's for the SQL version, so if you're using a ms sql db then you have to change a few stored procedures and add a new one, i would set a new forum with a fresh db and then just copy and paste the stored procedures that have changed from the new one to the old one, then import the new table, and add all the new fields manually........