Forgotten Hope Secret Weapon started as a small Minimod for Forgotten Hope mod for Battlefield 1942. The original intention was to bring some crazy but really planned weapons to FH like the Ratte Tank. However after 3 years of development, Forgotten Hope Secret Weapons became the biggest mod for Battlefield 1942 with dozens of improvements for the 'old' FH0.7 FHSW gives you more than 500 new equipments, new physics (bouncing bullets and towable artillery), more maps and even more mapimprovements/-changes on FHmaps and the new nation Hungary.
I have not been able to play this mod online(the three serves are almost always empty when I'm on), but from what I have heard this mod is excellent and brings alot of new features to the mod.
My only complaint so far is the lack of AI support that has been mentioned in a previous review and the lack of populated dedicated servers.
I hope that sometime in the near future there will be a similar mod for Forgotten Hope 2.