L2J Server

Just tell me if I'm wrong and I did something badly and I will have problems in the future

This is how I did manual update:

1. In Eclipse, I did both L2J_Server_BETA and L2J_DataPack_BETA checkouts.
2. Right clicked on their builds and made 1 Ant build and god gave me 2 zip files of server and datapack.
3. I extracted them into one folder and copied all data over my server files by overwriting everything (except sql folder).
4. tools>database installer - I upgraded everything.
5. In the end, I edited L2JConfing.exe with same configurations I made earlier and I changed ipconfing.xml ofc.

Do I miss something here?

P.S. I do understand this is bad way but how to update as easy as possible?

point 3 is wrong, because you need to delete your old files, other way you will have old files mixed new files.

As I understood I must do checkout only once in server life. Next step for future updating is this ?

In the Navigator window:
Right click on L2_Gameserver.
Select Team.
Select Synchronize With Repository.
A Sychronize pane will open with a list of updates.
Right click on L2_Gameserver.
Click Update.
Compile and install again.

And after this I will be able to see changed files more clearly and then I could copy new ones (for ex.: 6 files) and overwrite my old server files with them ?