OK to drop my Mindrack world into DW20 or Ultimate packs?

[EZ2Remember]

Would there be any problems if I used my already created "world" from the Mindcrack pack with the DW20 or Ultimate pack, has anyone tried doing this?

 

[Dafuq?]

Ultimate should work, DW will most likely cause trouble if you have advanced solars as those have the same Block ID as compact solars...

EDIT: I shouldn't have to mention it, but make a backup before trying. Always make backups.