Many here have found the process of installing SDM or CHDK a tricky process - even with my ACID, SDMInst, WICKS and LICKS apps. With a prod from David Sykes, I've written two new apps which make the process much
simpler. No options or choices - all you have to do is drop a photo on the app and click a button to go through the entire download and install process.
Both apps (written in java) are cross-platform and run on OSX, Windows (XP to Windows 8) and Linux (Ubuntu at least). ASSIST
(Automatic Simple SDM Installation and Setup Tool) installs SDM
(Simple Tool for Installing CHDK) installs CHDK
The apps take care of any necessary partitioning or formatting (and do neither if things are already OK). They also know that post-2011 Canon cameras can boot CHDK or SDM from FAT32 cards (and hence don't need two partitions on cards bigger than 4Gb). All this means that once you've dropped the photo the apps know exactly what they have to do.
I intend to add a customisation step at the end of the install process to make things easier for KAP or PAP (e.g. ensuring the CFG file settings make USB triggering work 'out of the box', making a simple intervalometer script the default etc).