hi tabby m. and welcome to
RP
i'm a bit curious here. why the split in the image and could you post the original that's not split? and what do you mean by 'cut off at the sides'?
photoshop L.E. 5.0 is a bit lightweight. you wont be able to do a number of things there. the gimp shld be fine for a lot of things, however. learning what all these tools are and what they do is key. i mean, imagine a carpenter that didnt know how to use a saw. it's the same with graphic editing. i forget what help the gimp has, but i'm sure it has some. clear up the terminology with a glossary or a 'definitions' if available. play with each item until you've got it. things like layers, curves and masks are going to come up in many of the tutorials you may read. clear up the words and what each item does in practice... and then go practice....a lot!
you've got a good basic start to your image. but obviously you recognize there's more you could maybe do. the woman's face has a bit too much cyan in it. the man's face is a bit dark and a bit too 'noisy'. the woman's chest is a bit washed out (too bright/white) and the baby's face is uneven is tone. you've also got some blue/cyan problems in the baby's extremities. all these things take their own treatment and that's where things like masks and layers and selections come in.
i'll give you some quick definitions and analogies to see if we cant get you started. layers are almost exactly what they imply in the name. think of your original image as if it were a piece of paper. it's one layer. now, you can add other pieces of paper on top of that one. each piece of new paper is a new layer. the great thing about layers is that your overall image look can change with each layer you add, depending on what you do. but the overall image will represent ALL the layers combined. thus, if you had a picture of a cat as your basic layer and put another picture of a dog over the top of the cat, you would see the dog. but, if you reduced the opacity of the layer with the dog, the cat would be begin to show through as well. if you reduced the opacity of the layer with the dog to 0, then only the cat would show. that make sense?
so, in your picture you posted here, if you put a blank layer over the top of your picture and painted it where the woman's face is, and you painted that area red and then lowered the opacity of the red layer, the woman's face would start to show and you would see the red color as if it were part of the woman's face, thus coloring it a bit.
in general, the layers have a priority. the one on top is going to be seen first and foremost and affect all the layers beneath it, just as you would see it first if these were stacked up on top of each other. but, as stated above, each layer has an adjustable opacity/transparency setting, a slider which allows any given layer to be more or less transparent. 0 is completely transparent. 100 is completely opaque. so, you might have 10 layers for a given image and each set with a different opacity allowing each layer to influence the look of the overall image.
ok, still with me? masks are a bit different. masks are like having a layer with an adjustable opacity setting IN that layer. the mask is IN the same layer as whatever the image is in that layer. and EVERY pixel of the MASK can be set to a different opacity. the mask itself comes in 256 shades of gray. any pixel of the mask can be set to any of these 256 shades of gray, from complete black, which is 0, to complete white, which is 255. the darker the shade, the more that gets masked. the whiter the shade, the less that gets masked. this mask affects the image within the same layer. it's again like pieces of paper, but this time your basic piece of paper (the basic image) has an individual pixel opacity/transparency setting (the mask). so, in the image you posted here, you could make another layer of your original layer and then apply a mask to this duplicate layer. you could then edit the mask itself and make all the areas of the mask black except those of the woman's face and you could make all the area of her face white. remember, when you edit the mask you're not changing the image in the layer, you're just changing the mask sitting on top of it in that layer.
when you then turned off editing the mask and painted on that layer, only the woman's face would be altered. all the rest of that layer is masked in black which doesnt allow any changes. it masks it. actually, an easier way to think of masks is in the real world sense of what a mask is. if you wear a halloween mask, you have cutouts for the eyes and nostrils and so on, but you also have areas you cant see through. the cutout areas are like the white and the other is like black. you can 'see' through the cutouts, the white. you cant see through the non-cutouts, the black. but, i also said you have 256 shades in this mask, from complete black to complete white. well, the shades represent a scale of opacity/transparency. the lighter it is the more transparent it is. the darker it is, the less transparent. so, if you put a gray in there with a value of 127, that is half opaque and half transparent and so some of what you paint over this mask will show through, but not all.
ok, this post is getting a bit long and i didnt originally mean for this to be so long...my definition of 'quick'
anyways, ask questions. the folks here are quite helpful. this is a great learning site. and again, welcome to
RP.
Craig