If it's water-based stain, then yes, it will raise the grain when applied, just the same as simply washing the wood down with water would do. It's actually quite a useful procedure for getting rid of loose wood grains at the start of your build.

The normal reason for pictures not loading is that they are too big. You'll need to find a way of reducing the pixel size so that for a .jpg, .gif or .png the maximum length of any side is 1500 pixels and the overall file size is less than 976 kB (I use Photoshop Elements but there should be free editing programs out there - or else check for that function in any bundled picture editing software you may have). Or else host them at a 3rd party site and link to them there. Find the 'insert image' icon on the forum toolbar and copy in the link reference.