Also, (I should have asked this straight away, slipped my mind)
Can you describe what exactly you mean by "Won't work"?
Does the app open at all? Does it force close?
Are you having any problems with any other apps?
Have you tried rest...
Providing some more information may help get your question answered sooner.
What device are you using?
What version of Cyanogenmod are you running?
Feel free to provide any other information you think is relevant.
I'm currently running CM9 on my 16 gb Touchpad and haven't run into a shortage. Even with quite a bit of media content (Several movies, a TV series) I still have room to spare.
For your lighter usage I think you will have no problems with the 1...