Re: Metropolis Blog
Why not try installing SDK's Gun Mods? Install it without the FPS part, and it doesn't use any block ids. (maybe just a few, I can't really be bothered checking right now ). You get a nice shiny laser guided rocket launcher, plus headshots ;D The latest version doesn't use forge anymore, but it might still work. You can always use the old v4, you won't miss out on much. Also, you should be able to squeeze in the Explosives+ mod. Adds a lot of epic boom stuff. The Yogscast did a few videos on it earlier.
Sdks mods: http://www.minecraftforum.net/topic/86765-11-sdks-mods-v5-feb-18-forge-dropped/
Explosives+: http://www.minecraftforum.net/topic/830138-11-explosives-v27-explosivevolcanic/
Edit: Completely forgot, to get the config file for the Explosives+ mod, you'll need to run it somewhere with more free ids first. The config isn't created unless Minecraft is actually done loading, which won't happen with the Technic Pack because of all the used block ids. You can change them afterwards.