Idea Blade/ZTE Blade comes with 167 MB usable memory. Their is no way you can install CyanogenMod9/10 in such a low RAM. However I took a chance and installed CM9 and it slogs like hell. Swapper2 can be used to add swap, but it adds another memory and space constraint. drewhill77 came up with an excellent way to add swap without installing swapper2. This is a simple way using which a swap is added in typical UNIX system.