Hiding Screenshots

I'm about to post my project on the forums, but I have about 10 screenshots I'd like to have within the thread. Unfortunately, I can't figure out how to keep the images hidden because [SPOILER][/SPOILER] doesn't work, and neither does [hidden=Screenshots][/hidden].

Is there another alternative I can use other than posting screenshots within attached thumbnails? I want to make it easy to access all the screenshots at once.|||Uh.. does that mean there is no alternative? |||The limit is 10 images per post, restricted by a certain size obviously, so;

1./ What exactly do you want to post and where?

2./ what kind of pictures do you want to attach?