Um...I think you are misunderstand something so I will list you content in my uploads :)
(FN輸入) (18禁ゲーム) [130830] [TEATIME] らぶデスFINAL！ (iso+mds rr3).rar ~> Love Death Final
(FN輸入) (18禁ゲーム) [130830] [TEATIME] らぶデスFINAL！ 初回特典 歴代BGM全曲集＆1000体キャラデータ (iso+mds,png rr3).rar ~> Love Death Final Bonus and BGM Collection
(FN輸入) (18禁ゲーム) [130830] [TEATIME] らぶデスFINAL！ 初回特典 初代らぶデス (iso+mds,png rr3).rar ~> Love Death First Generation, it mean Love Death ～Realtime Lovers～ released in 2005
(FN輸入) (18禁ゲーム) [130830] [TEATIME] らぶデスFINAL！ マニュアル.rar ~> Love Death Final Manual
ldf_plus01.exe ~> Love Death Final DLC
That mean, no need to install Love Death First Generation if you already played it back then. You just need install Love Death Final, then Bonus and DLC, it is just my guess, you can try and tell me if it is work or not so I will think about other solution ^_^
girlcelly
(FN輸入) (18禁ゲーム) [130830] [TEATIME] らぶデスFINAL！ (iso+mds rr3).rar ~> Love Death Final
(FN輸入) (18禁ゲーム) [130830] [TEATIME] らぶデスFINAL！ 初回特典 歴代BGM全曲集＆1000体キャラデータ (iso+mds,png rr3).rar ~> Love Death Final Bonus and BGM Collection
(FN輸入) (18禁ゲーム) [130830] [TEATIME] らぶデスFINAL！ 初回特典 初代らぶデス (iso+mds,png rr3).rar ~> Love Death First Generation, it mean Love Death ～Realtime Lovers～ released in 2005
(FN輸入) (18禁ゲーム) [130830] [TEATIME] らぶデスFINAL！ マニュアル.rar ~> Love Death Final Manual
ldf_plus01.exe ~> Love Death Final DLC
That mean, no need to install Love Death First Generation if you already played it back then. You just need install Love Death Final, then Bonus and DLC, it is just my guess, you can try and tell me if it is work or not so I will think about other solution ^_^
girlcelly