I'd really like to try this as I get a pretty variable reception at home. I've downloaded the above files and installed the app but it ain't working. I'm presuming I need to install the other files but I don't know how, could someone explain as long as it's not too complex?
Copy the SignalBoost folder you downloaded into C:\SanDiego\tools. Then create a new text document and paste the following into it ;-
adb push C:\SanDiego\tools\SignalBoost\app\signalboost.apk /system/app
adb push C:\SanDiego\tools\SignalBoost\etc\rild.conf /system/etc
adb push C:\SanDiego\tools\SignalBoost\lib\libganril.so /system/lib
adb push C:\SanDiego\tools\SignalBoost\lib\libkineto.so /system/lib
adb push C:\SanDiego\tools\SignalBoost\lib\librilswitch.so /system/lib
save the text file into C:\SanDiego\tools and rename it to a .bat file. Plug your phone in and run the .bat file you just created.
I've just installed it and it runs perfectly, you'll find the app in your app drawer.