I just got done reading your 3 DIY pieces; I think your idea is great; the execution has a lot of room for improvement. The is a lot missing from them, the one on ceilings for instance, I thought there would be information in regard to getting clean lines between the ceiling and wall, information on painting pop corn vs. other ceilings, stuff about drop cloths, the proper tools, extension pieces vs. a step ladder, how to paint around the lights, ect...
One word of warning is that consumers are very smart and very savvy today. If they pick up your DIY piece and have expectations going into reading it that you don't meet and actually exceed they are going to see right through it. Lowes has their own pamphlets on subjects just like your idea, they are extremely well done, I would strive to get yours to that level. To be honest with you I would pick yours up and within 30 seconds I would be thinking just another mediocre DIY pamphlet, it would color my entire perception of what your store is going to have to offer me.
I hope that isn't too harsh. I like the idea, I think you just need to really polish the execution, I would give it about a C- right now. You need to get it to an A+. Pick a level of customer you want to reach and write it in a way that a 9 year old could understand it.
Good luck.