yeah acctually i have seen one guy and a girl how modded their 2G with his mod... i just found out where i can solder the SED and i have got a SED from an old iPhone-backlight, so i dont need any transistors or somthing like that...^^
a material to fill the hole... hm, first i thought about glue, hot glue for example but then i thought <-
naa, will look much too cheap... so now i hope it works like this: the hole will be covered with a crystal plate on the outside so u cannot feel the place where the hole was if u dont look at the back-cover... this plate is not that phat like the baccase, so the SED fits betreen the plate and the accu... and that u don't always have to look at the darn SED i will use a diffuser so u cannot see where the light is comming from...^^
there is so less space behind the accupack, i have to fit the SED inside the hole, not behind... but the cover is much thicker on the backside, so hopefully it will work...