this is my current mods list:
Generic Mod Enabler - v2.6.0.157
RFB_2.0
RFB_2.0_Patch_23April2010
RSRDC_RFB_V575
RSRDC_V5xx_Patch1
EAXsoundsim_without_WebstersManeuver_STOCK_GFO_OM
Improved Ship Physics_2.1
Guerrilla-Submarines-Spyron-Mod-v1
Classe_Balao_CamoTri
GSSpyron changed a ton of things in RSRD but only a few in RFB and none on the ISP.
While the game play seemed normal and the first mission was enjoyable trying to sink a ship was next to impossible. I also found that at Rabaul The British had control of Rabaul and had ships there with a PT boat as a guard but right below it in the bay there was a Japanese port.
When ISP 2 came out it had a few bugs such as impossible to sink vessels. Some how this mod while not changing 2.1 has changed the ships to be harder to sink. If your going 2 knots in reverse the amount of time to then go 2 knots forwards seems rather long.
I did like the men on the bow during the mission that was a nice touch but I feel GSS interferes with RSRD and ISP way to much to have them in a mods list with it.