Hahaha, yeah. I've located them all. But it's been a while since I haven't played. You could go on Gamefaqs. I'm not exactly sure to remember all of them (the ones in x5 and x6 that is.)
Well, I must say I used to be a pro in MegaMan back in time xD. I was never using subtanks or anything of that kind. But you know, it ain't that hard of a game. You've got to memorize their patterns, that's all. It gets easy once you do so. I've never used any guides.
Well as for X6. It's all cool man, I loved using the sabers nonetheless xD. And in order to improve, I've had challenged myself in beating the whole game with Zero's Saber only, and regular X's buster only. That was the real fun.
You just need reflexes and get more familiar with the bosses' patterns. I've learnt them all quickly. I'm pretty sure you'll get the hang of it. Being an expert in MegaMan is nothing you can really brag about though, it's not really hard.
BTW- Which parts are you missing? Gaea/Falcon armor in X5 or is it Shadow/Blade Armor in X6?