Yes, you're better off downloading TMO 2.5 and the Small Patch that corrects the
Tambor glitch; given a new command of a Tambor class after patrolling in a Gato, not into a Balao class.
To enable the Tambor class for the entire War campaign that Ducimus designed, just disable the Small Patch.
TMO 2.5 with RSRD doesn't appear to need the Small Patch, however with RSRD you are playing RSRD, not TMO 2.5 or its campaign because so many things are changed from Ducimus' carefully balanced ideas of how he thought SH4 should be played.
1_TMO_25_small_patch
http://www.subsim.com/radioroom/down...o=file&id=3506
Hope this helps.
Happy Hunting!